= MediaWiki release notes =

== MediaWiki 1.16.2 ==

2011-02-01

This is a security and maintenance release of the MediaWiki 1.16 branch.

=== Summary of selected changes in 1.16 ===

Selected changes since MediaWiki 1.15 that may be of interest:

* A new skin called Vector was added

* Watchlists now have RSS/Atom feeds. RSS feeds generally are now hidden, 
  since Atom is a better protocol and is supported by virtually all clients.

* It's now possible to block users from sending email via Special:Emailuser.

* The maintenance script system was overhauled. Most maintenance scripts now 
  have a useful help page when you run them with --help.

* AdminSettings.php is no longer required in order to run maintenance scripts. 
  You can just set $wgDBadminuser and $wgDBadminpassword in your 
  LocalSettings.php instead.

* The preferences system was overhauled. Preferences are stored in a more 
  compact format. Changes to site default preferences will automatically 
  affect all users who have not chosen a different preference.

* Support for SQLite was improved. Some broken features were fixed, and it 
  now has an efficient full-text search.

* The user groups ACL system was improved by allowing rights to be revoked, 
  instead of just granted.

* A new localisation caching system was introduced, which will make MediaWiki 
  faster for almost everyone, especially when lots of extensions are enabled.

By default, this new system makes a lot of database queries. If your database 
is particularly slow, or if your system administrator limits your query count, 
or if you want to squeeze as much performance as possible out of Mediawiki, 
set $wgCacheDirectory to a writable path on the local filesystem. Make sure 
you have the DBA extension for PHP installed, this will improve performance 
further.

== Changes since 1.16.1 ==

* (bug 26642) Fixed incorrect translated namespace due to a regression in the
  language converter.
* The interface translations were updated.
* (bug 27093, CVE-2011-0047): Fixed CSS injection vulnerability.
* (bug 27094) Fixed server-side arbitrary script inclusion vulnerability. 
  Affects Windows servers only. A malicious file with extension ".php" must 
  exist on the server for the exploit to be effective.

== Changes since 1.16.0 ==

* (bug 24981) Allow extensions to access SpecialUpload variables again
* (bug 24724) list=allusers was out by 1 (shows total users - 1)
* (bug 24166) Fixed API error when using rvprop=tags
* For wikis using French as a content language, Special:Téléchargement works 
  again as an alias for Special:Upload.
* (bug 25167) Correctly load JS fixes for IE6 (fixing a regression in 1.16.0)
* (bug 25248) Fixed paraminfo errors in certain API modules.
* The installer now has improved handling for situations where safe_mode is 
  active or exec() and similar functions are disabled.
* (bug 19593) Specifying --server in now works for all maintenance scripts.
* Fixed $wgLicenseTerms register globals.
* (bug 26561) Fixed clickjacking vulnerabilities by introducing support for 
  X-Frame-Options. The header value can be configured using $wgBreakFrames and
  $wgEditPageFrameOptions.

== Changes since 1.16 beta 3 ==

* (bug 23769) Disabled HTML 5 client-side form validation. Was introduced in 
  1.16 beta 1, but is currently poorly supported by browsers.
* (bug 23175) Re-added window.ta variable for backwards compatibility.
* (bug 23264) Fixed breakage of various command line scripts due to extra line
  endings being inserted by Maintenance::output().
* Fixed HTTP client functionality with safe_mode=On.
* Fixed parser tests broken in 1.16 beta 3.
* For Oracle DB backend: fixed parser tests and table prefix feature.
* (bug 23767) Fixed PHP warning when REQUEST_URI is blank (IIS issue).
* Fixed plural function for Northern Sami (se)
* (bug 23597) Fixed conflicts between ID attributes in the Vector skin and 
  parser-generated heading IDs. Renamed head, panel, head-base and page-base.
* Disabled $wgHitcounterUpdateFreq>1 feature on SQLite, does not work yet.
* (bug 23465) Don't ignore the predefined destination filename on 
  Special:Upload after following a red link to a file.
* In SQLite full-text search feature: fixed "move page" feature, was non-
  functional.
* (bug 24565) Fixed Cache-Control headers sent from API modules, to protect
  user privacy in the case where an attacker can access the wiki through the
  same HTTP proxy as a logged-in user.
* Fixed an XSS vulnerability in profileinfo.php for installations with 
  $wgEnableProfileInfo = true (false by default)
* Fixed a case where an X-Vary-Options header was sent despite $wgUseXVO being
  false. Fixed a minor header parsing issue when $wgUseXVO = true.
* Fixed a register_globals arbitrary inclusion vulnerability in 
  MediaWikiParserTest.php, introduced in 1.16 beta 1.

== Changes since 1.16 beta 2 ==

* Fixed bugs in the [[Special:Userlogin]] and [[Special:Emailuser]] handling of
  invalid usernames.
* Fixed sorting in [[Special:Allmessages]]
* (bug 23113) Fixed title in the show/hide links on diff pages
* (bug 23117) Fixed API rollback, was returning "badtoken" for valid requests
* (bug 23127) Re-added missing $1 parameter to the uploadtext message
* Fixed a bug in the Vector skin where personal tools display behind the logo
* (bug 23139) Fixed a bug in edit conflict resolution, where both textboxes 
  showed the same text.
* (bug 23115, bug 23124) Fixed various problems with <title> and <h1> elements
  in page views and previews when the language converter is enabled.
* (bug 23148) Fixed a local path disclosure vulnerability in ImageMagick image
  scaling, which was introduced in 1.16 beta 1. 
* Improved error checking on installer.
* (bug 22970) Fixed a JavaScript error in the upload destination conflict 
  check.
* (bug 23167) Check the watch checkbox by default if the watchcreations 
  preference is set.
* (bug 23171) Improve IE6 version check to avoid false positives.
* (bug 23176) Fixed upload warning override feature "upload new version", 
  broken in 1.16 beta 1.
* Fixed regression in unwatch links sent out in notification emails. When the 
  mailing job was deferred via the job queue, the title was incorrect.
* (bug 23534) Fixed SQL query error in API list=allusers.
* Fixed a bug in uploads for non-JavaScript clients. An empty string was used
  as the default destination filename, instead of the source filename as 
  expected.
* (bug 23371) Fixed CSRF vulnerability in "e-mail me my password", "create 
  account" and "create by e-mail" features of [[Special:Userlogin]]
* (bug 23687) Fixed XSS vulnerability affecting IE clients only, due to a CSS 
  validation issue.
* Fixed a DoS vulnerability in ImageMagick image scaling. ImageMagick 
  expanded wildcard characters "?" and "*" in image filenames, potentially 
  causing large numbers of images to be scaled in response to a single request.
  The fix for this involves breaking the scaling of such image filenames until
  ImageMagick 6.6.1-5 or later is deployed, see bug 23361 for more details.
* (bug 23608) Fixed invalid HTML in diff pages.

=== Changes since 1.16 beta 1 ===

* Fixed errors in maintenance/patchSql.php
* (bug 19627) Fix regression from r57867 where HTMLForm would output 
  <element classes="foo bar"> rather than <element class="foo bar">
* Fixed broken "-r" option to maintenance/lag.php
* (bug 23076) Fixed login CSRF vulnerability. Logins now require a token to 
  be submitted along with the user name and password.

=== Configuration changes in 1.16 ===

* (bug 18222) $wgMinimalPasswordLength default is now 1
* $wgSessionHandler can be used to configure session.save_handler
* $wgLocalFileRepo/$wgForeignFileRepos now have a 'fileMode' parameter to
  be used when uploading/moving files
* (bug 18761) $wgHiddenPrefs is a new array for specifying preferences not
  to be shown to users
* $wgAllowRealName and $wgAllowUserSkin were deprecated in favor of
  $wgHiddenPrefs[] = 'realname', but the former are still retained
  for backwards-compatibility
* (bug 9257) $wgRCMaxAge now defaults to three months
* $wgDevelopmentWarnings can be set to true to show warnings about deprecated
  functions and other potential errors when developing.
* Subpages are now enabled in the MediaWiki namespace by default.  This is
  mainly a cosmetic change, and does not in any way affect the MessageCache,
  which was already effectively treating the namespace as if it had subpages.
* Oracle: maintenance/ora/user.sql script for creating DB user on oracle with
  appropriate privileges. Creating this user with web-install page requires
  oci8.privileged_connect set to On in php.ini.
* Removed UserrightsChangeableGroups hook introduced in 1.14
* Added $wgCacheDirectory, to replace $wgFileCacheDirectory,
  $wgLocalMessageCache, and any other local caches which need a place to put
  files.
* $wgFileCacheDirectory is no longer set to anything by default, and so either
  needs to be set explicitly, or $wgCacheDirectory needs to be set instead.
* $wgLocalMessageCache has been removed. Instead, set $wgUseLocalMessageCache
  to true
* Removed $wgEnableSerializedMessages and $wgCheckSerialized. Similar
  functionality is now available via $wgLocalisationCacheConf.
* $wgMessageCache->addMessages() is deprecated. Messages added via this
  interface will not appear in Special:AllMessages.
* $wgRegisterInternalExternals can be used to record external links pointing
  to same server
* (bug 19907) $wgCrossSiteAJAXdomains and $wgCrossSiteAJAXdomainExceptions added
  to control which external domains may access the API via cross-site AJAX.
* $wgMaintenanceScripts for extensions to add their scripts to the default list
* $wgMemoryLimit has been added, default value '50M'
* $wgExtraRandompageSQL is deprecated, the SpecialRandomGetRandomTitle hook
  should be used instead
* (bug 20489) $wgIllegalFileChars added to override the default list of illegal
  characters in file names.
* (bug 19646) $wgImgAuthDetails added  to display reason access to uploaded file
  was denied to users(img_auth only)
* (bug 19646) $wgImgAuthPublicTest added to test to see if img_auth set up
  correctly (img_auth only)
* $wgUploadMaintenance added to disable file deletions and restorations during
  maintenance
* $wgCapitalLinkOverrides added to configure per-namespace capitalization
* (bug 21172) $wgSorbsUrl can now be an array with multiple DNSBL and renamed
  to $wgDnsBlacklistUrls (backward compatibility kept)
* $wgEnableHtmlDiff has been removed
* (bug 3340) $wgBlockCIDRLimit added (default: 16) to configure the low end of
  CIDR ranges for blocking
* $wgUseInstantCommons added for quick and easy enabling of Commons as a remote
  file repository
* $wgDBAhandler added to choose a DBA handler when using CACHE_DBA
* $wgPreviewOnOpenNamespaces for extensions that create namespaces that behave
  similarly to the category namespace.
* $wgEnableSorbs renamed to $wgDnsBlacklistUrls ($wgEnableSorbs kept for
  backward compatibility)
* $wgUploadNavigationUrl now also affects images inline images that do not
  exist. In that case the URL will get (?|&)wpDestFile=<filename> appended to
  it as appropriate.
* If $wgLocaltimezone is null, use the server's timezone as the default for
  signatures. This was always the behaviour documented in DefaultSettings.php
  but has not been the actual behaviour for some time: instead, UTC was used
  by default.
* Added $wgExtensionAssetsPath, to decouple assets serving from $wgScriptPath.
  If not specified it will default to $wgScriptPath/extensions
* Added $wgCountTotalSearchHits to make search UI display total number of hits
  with some search engines.
* Added $wgAdvertisedFeedTypes to decide what feed types (RSS, Atom, both, or
  neither) MediaWiki advertises.  Default is array( 'atom' ), so RSS is no
  longer advertised by default (but it still works).
* Added $wgMemCachedTimeout, controls how long to wait for data from the
  memcached servers.
* New configuration variables $wgDebugTimestamps and $wgDebugPrintHttpHeaders
  for controlling debug output.
* New $wgBlockDisablesLogin when set to true disallows blocked users from
  logging in.
* (bug 8790) Metadata edition ($wgUseMetadataEdit) has been moved to a separate
  extension "MetadataEdit".

=== New features in 1.16 ===

* A new skin called Vector was added
* Add CSS defintion of the 'wikitable' class to shared.css
* (bug 17163) Added MediaWiki:Talkpageheader which will be displayed when
  viewing talk pages
* Superfluous border="0" removed from images
* Added new hook 'MessageCacheReplace' into MessageCache.php. For instance
  to allow extensions to update caches in similar way as MediaWiki invalidates
  a cached MonoBook sidebar
* Special:AllPages: Move hardcoded styles from code to CSS
* (bug 18529) New hook: SoftwareInfo for adding information about the software
  to Special:Version
* Added $wgExtPGAlteredFields to allow extensions to easily alter the data
  type of columns when using the Postgres backend.
* (bug 16950) Show move log when viewing/creating a deleted page
* (bug 18242) Show the Subversion revision number per extensions in
  Special:Version
* (bug 18420) Missing file revisions are handled gracefully now
* (bug 9219) Auth plugins can control editing RealName/Email/Nick preferences
* (bug 18466) Add note or warning when overruling a move (semi-)protection
* (bug 18342) insertTags works in edit summary box
* (bug 18411) The upload form also checks post_max_size
* Watchlist now has a specialized <div> tag that contains a unique class for
  each page
* Added Minguo calendar support for the Taiwan Chinese language
* Database: unionQueries function to be used for UNION sql construction, so
  it can be overloaded on DB abstraction level for DB specific functionality
* (bug 18849) Implement Japanese and North Korean calendars
* (bug 5755) Introduce {{CURRENTMONTH1}} and {{LOCALMONTH1}} to display the
  month number without the leading zero
* (bug 13456) categoriespagetext supports PLURAL
* (bug 18860) Blocks of IPs affecting registered users can now block email
* (bug 17093) Date and time are separate parameters in Special:BlockList
* (bug 11484) Added ISO speed rating to default collapsed EXIF metadata view
* (bug 14866) Messages 'recentchangeslinked-toolbox' and
  'recentchangeslinked-toolbox' were added to allow more fine grained
  customisation of the user interface
* DISPLAYTITLE now accepts a limited amount of wiki markup (the single-quote
  items)
* Special:Search now could search terms in all variant-forms. ONLY apply on
  wikis enabled LanguageConverter.
* Add autopromote condition APCOND_BLOCKED to autopromote blocked users to
  various user groups.
* Add $wgRevokePermissions as a means of restricting a group's rights. The
  syntax is identical to $wgGroupPermissions, but users in these groups will
  have these rights stripped from them.
* Added a PHP port of CDB (constant database), for improved local caching when
  the DBA extension is not available.
* Introduced a new system for localisation caching. The system is based around
  fast fetches of individual messages, minimising memory overhead and startup
  time in the typical case. The database backend will be used by default, but
  set $wgCacheDirectory to get a faster CDB-based implementation.
* Expanded the number of variables which can be set in the extension messages
  files.
* Added a feature to allow per-article process pool size control for the parsing
  task, to limit resource usage when the cache for a heavily-viewed article is
  invalidated. Requires an external daemon.
* (bug 19576) Moved the id attribues from the anchors accompanying section
  headers to the <span class="mw-headline"> elements within the section headers,
  removing the redundant anchor elements.
* Parser::setFunctionTagHook now can be used to add a new tag which is parsed at
  preprocesor level.
* Added $wgShowArchiveThumbnails, allowing sysadmins to disable thumbnail
  display for old versions of images.
* In watchlists and Special:RecentChanges, the difference in page size now
  appears in dark green if bytes were added and dark red if bytes were removed.
* Added FSRepo configuration properties thumbUrl and thumbDir, to allow the
  thumbnails to be stored in a separate location to the source images.
* If config/ directory is not executable, the command to make it executable
  now asks the user to cd to the correct directory
* Add experimental new external authentication framework, ExternalAuth
* (bug 18768) Remove AdminSettings requirements. Maintenance environment
  will still load it if it exists, but it's not required for anything
* (bug 19900) The "listgrouprights-key" message is now wrapped in a div with
  class "mw-listgrouprights-key"
* (bug 471) Allow RSS feeds for watchlist, using an opt-in security token
* (bug 10812) Interwiki links can have names and descriptions, fetched from
  message 'interwiki-desc-PREFIX', not really used anywhere yet though
* (bug 9691) Add type (signup or login) parameter to
  AuthPlugin::ModifyUITemplate()
* (bug 14454) "Member of group(s)" in Special:Preferences causes language
  difficulties
* (bug 16697) Unicode combining characters are difficult to edit in some
  browsers
* Parser test supports uploading results to remote CodeReview instance
* (bug 20013) Added CSS class "mw-version-ext-version" is wrapped on the
  extension version in Special:Version
* (bug 20014) Added CSS class "mw-listgrouprights-right-name" is wrapped on the
  right name in Special:ListGroupRights
* (bug 12920) New CoreParserFunction {{nse:...}} as an url-friendly equivalent
  to {{ns:...}}
* (bug 16322) Allow maintenance scripts to accept DB user/pass over input or
  params
* (bug 18566) Maintenance script to un/protect pages
* (bug 671) The HTML <abbr> tag is now permitted.
* RecentChanges now has a legend to explain what the Nmb! flags mean, and the
  flags have tooltips.
* (bug 15209) New hook BeforeInitialize called after everything has been setup
  but before Mediawiki::performRequestForTitle()
* wgMainPageTitle variable now available to JavaScript code to identify the main
  page link, so it doesn't have to be extracted from the link URLs.
* (bug 16836) Display preview of signature in user preferences and describe its
  use
* The default output format is now HTML 5 instead of XHTML 1.0 Transitional.
  This can be disabled by setting $wgHtml5 = false;.  Specific features enabled
  if HTML 5 is used:
** Some extra inputs will be autofocused, in supporting browsers.
** The summary attribute has been removed from tables of contents.  summary is
   obsolete in HTML 5 and wasn't useful here anyway.
** Unnecessary type="" attribute removed for CSS and JS.
** If $wgWellFormedXml is set to false, some bytes will be shaved off of HTML
   output by omitting some things like quotation marks where HTML 5 allows.
** (bug 16921) maxlength enabled for page move comments
* The description message in $wgExtensionCredits can be an array with parameters
* New hook SpecialRandomGetRandomTitle allows extensions to modify the selection
  criteria used by Special:Random and subclasses, or substitute a custom result,
  deprecating the $wgExtraRandompageSQL config variable
* (bug 20318) Distinct CSS classes for ISBN/RFC/PMID special links added
* (bug 20404) Custom fields in the user creation form template can now have
  detail labels in prefsectiontip divs.
* MakeSysop and MakeBot are now aliases for Special:UserRights
* IndexPager->mLimitsShown can now be an associative array of limit => text-to-
  display-in-limit-form.
* (bug 18880) LogEventsList::showLogExtract() can now take a string-by-reference
  and add its HTML to it, rather than having to go straight to $wgOut.
* Added $wgShowDBErrorBacktrace, to allow users to easily gather backtraces for
  database connection and query errors.
* Show change block / unblock link on Special:Contributions if user is blocked
* Display note on Special:Contributions if the user is blocked, and provide an
  excerpt from the block log.
* (bug 19646) New hook: ImgAuthBeforeStream for tests and functionality before
  file is streamed to user, but only when using img_auth
* Note on non-existing user and user talk pages if user does not exist
* New hook ShowMissingArticle so extensions can modify the output for
  non-existent pages.
* Admins could disable some variants using $wgDisabledVariants now. ONLY apply
  on wikis enabled LanguageConverter.
* (bug 16310) Credits page now lists IP addresses rather than saying the number
  of anonymous users that edited the page
* New permission 'sendemail' added. Default right for all registered users. Can
  for example be used to prevent new accounts from sending spam.
* (bug 16979) Tracking categories for __INDEX__ and __NOINDEX__
* Two new hooks, ConfirmEmailComplete and InvalidateEmailComplete, which are
  called after a user's email has been successfully confirmed or invalidated.
* (bug 19741) Moved the XCF files out of the main MediaWiki distribution, for
  a smaller subversion checkout.
* (bug 13750) First letter capitalization can now be a per-namespace setting
* (bug 21073) "User does not exist" message no longer displayed on sub-sub-pages
  of existing users
* (bug 21095) Tracking categories produced by the parser (expensive parser
  function limit exceeded, __NOINDEX__ tracking, etc) can now be disabled by
  setting the  system message ([[MediaWiki:expensive-parserfunction-category]]
   etc) to "-".
* Added maintenance script sqlite.php for SQLite-specific maintenance tasks.
* Rewrote Special:Upload to allow easier extension.
* Upload errors that can be solved by changing the filename now do not require
  reuploading.
* Added $wgRateLimitsExcludedIPs, to allow specific IPs to be whitelisted from
  rate limits.
* (bug 21222) When $wgUseTeX is not enabled, <math> is no longer registered with
  the parser so extensions are free to implement their own <math> tag
* (bug 21047) Wrap 'cannotdelete' into a div with the generic 'error' class and
  an own 'mw-error-cannotdelete' class
* New hook AbortNewAccountAuto, called before account creation from AuthPlugin-
  or ExtUser-driven requests.
* (bug 3480) The warning saying that the page has a history when deleting it now
  contains the number of revisions in the history
* $wgStylePath and $wgLogo are now set in the default LocalSettings.php file.
* (bug 20186) Allow filtering history for revision deletion.
* New hook OtherBlockLogLink, called in Special:IPBlockList and Special:Block
  to show links to block logs of other blocking extensions, i.e. GlobalBlocking
* Added search capabilities to SQLite backend
* rebuildtextindex.php maintenance script now supports databases other than
  MySQL
* upgrade1_5.php now requires to be run --update option to prevent confusion
* (bug 17662) Customizable default preload/editintro for new sections in the
  respective addsection-preload and addsection-editintro messages
* Added maintenance script checkSyntax.php that checks for PHP syntax errors
  and common coding mistakes
* Updated Unicode normalization tables
* (bug 21604) Spellcheck attribute for editsummary
* New wgCategories JavaScript global variable for userscripts.
* (bug 20717) Added checkboxes to hide users with bot and/or sysop group
  membership in SpecialActiveusers
* Allow \pagecolor and \definecolor in texvc
* $wgTexvcBackgroundColor contains background color for texvc call
* (bug 21574) Redirects can now have "303 See Other" HTTP status
* EditPage refactored to allow extensions to derive new edit modes much easier.
* (bug 21826) Subsections of Special:Version now also have anchors
* (bug 19791) Add URL of file source as comment to thumbs (for ImageMagick)
* (bug 21946) Sorted wikitables do not properly handle minus signs
* (bug 18885) Red links for media files do not support shared repositories
* Added $wgFixArabicUnicode, to convert deprecated presentation forms in
  Arabic text to their modern equivalents, and $wgFixMalayalamUnicode, to
  convert ZWJ-based chillu sequences in Malayalam text to their Unicode 5.1
  equivalents.
* (bug 22051) Returing false in SpecialContributionsBeforeMainOutput hook now
  stops normal output
* Send new password e-mail in users preference language
* LanguageConverter now support nested using of manual convert syntax like
  "-{-{}-}-"
* Upload license preview now uses the API instead of action=ajax
* (bug 7346) Add <guid> to RSS to avoid duplicates
* (bug 19996) Added new hooks for Special:Search, which allow to further
  restrict/expand it.
* (bug 21936) When a revision has been patrolled, there's now a link back to the
  article
* (bug 22315) SpecialRecentChangesQuery hook now pass $query_options and checks
  the return value
* Separate unit test suites under t/ and tests/ were merged and moved to
  maintenance/tests/.
* importImages.php maintenance script can now use the original uploader and 
comment from another wiki.
* Support for Turck MMCache was removed
* (bug 14592) Warn users when they try to move their user page that their
  account will not be renamed
* Show block log on non-existing user (talk) pages of currently blocked users

=== Bug fixes in 1.16 ===

* (bug 18031) Make namespace selector on Special:Export remember the previous
  selection
* The svn-version version numbers on Special:Version have been removed
* (bug 17374) Special:Export no longer exports two copies of the same page
* (bug 18190) Proper parsing in MediaWiki:Sharedupload message
* (bug 17617) HTML cleanup for ImagePage
* (bug 17964) namespaceDupes.php no longer fails on an empty interwiki table
* Improved error handling for image moving
* (bug 17974) On Special:SpecialPages, restricted special pages are now marked
  with <strong> tags, helps with text-based browsers
* (bug 18259) Special:DeletedContributions now also uses
  MediaWiki:Sp-contributions-logs for the link to Special:Log
* Don't add empty title="" attributes to links to anchors on the current page
* (bug 18291) rebuildrecentchanges.php failed to add deletion log entries
* (bug 18304) rebuildrecentchanges.php got size changes wrong
* (bug 18170) Fixed a PHP warning in Parser::preSaveTransform() in PHP 5.3
* (bug 18289) Database connection error page now returns correct HTML
* "successbox", "errorbox" and related CSS classes are now available in all
  skins
* (bug 18316) Removed superfluous name="fulltext" from Special:Search
* (bug 18331) MediaWiki:Undelete-revision can now have wikitext
* The "noautoblock" flag is no longer displayed in the block log when blocking
  an IP address
* (bug 18009) $wgHooks and $wgExtensionFunctions now support closures
* (bug 17948) Maintenance scripts now exit(0) or exit(1) as appropriate
* (bug 18377) Time in Enhanced ChangesList lacking localisation
* (bug 12998) Allow <sup>, <sub>, etc. in DISPLAYTITLE
* (bug 1553) Lowercase navigation headings in German
* (bug 7830) Pending transactions failed to commit on loginToUse() error
* (bug 11613) session.save_handler being over-ridden
* (bug 11381) session.save_handler being set twice (causes error)
* (bug 17835) ForeignAPIRepo throwing error on first page load for file
* (bug 18115) ForeignAPIRepo cache isn't working
* Fixed a bug caused by LanguageConverter.php, which brings an abnormal '}-'
  after some parsed math syntax.
* (bug 18441) rebuildrecentchanges.inc no longer ignores $wgLogRestrictions
* (bug 18317) Bolded selections in 1 | 3 | etc days on RecentChanges now use
  <strong> instead of hardcoded styles
* (bug 18449) Fixed items number per column on category pages when the total is
  divisible by 3
* (bug 18121) maintenance/deleteArchivedRevisions.php no longer deletes
  revisions when --delete is not passed
* (bug 13172) GPS coordinates in image Exif data are now actually displayed
* Overhaul of preferences system, includes the following bug fixes:
** (bug 5363) Changes to default preferences now impact registered users.
** (bug 14806) Hook to enable putting preferences in existing tabs.
** (bug 17191) Registration date now listed on preferences page.
** The user_properties table (now used for storing preferences) has been added
   to $wgSharedTables.
** Note that this change will break some extensions which have not been adapted
   for it.
* (bug 17020) Adding fallback encodings for Traditional and Simplified Chinese
  languages while the the text is typed as URLs.
* (bug 17614) Prev / Next links are not shown if all results are shown
* (bug 18207) Strange spacing before [[irc:...]] links
* Removed float from the user login form in RTL interface - caused display
  problems in FF2
* (bug 15008) Redirect images are now subject to Bad image list rules
* (bug 6802) profileinfo.php now also work on other database servers than MySQL
* (bug 16925) Diffs no longer fail when $wgExternalDiffEngine is set to
  'wikidiff' or 'wikidiff2' but extension is not installed
* (bug 18326) Chmod errors in file repos have been hidden
* (bug 18718) Comma after a } create a error in IE
* (bug 18716) Removed redundant class in Modern skin CSS for category links and
  tweaked spacing.
* (bug 18656) Use proper directory separators in wfMkdirParents()
* (bug 18549) Make Special:Blockip respect $wgEnableUserEmail and
  $wgSysopEmailBans
* (bug 16912) Tooltips on images with link= disappear
* (bug 18389) Localise numbers in EXIF data
* (bug 18522) Wrap MediaWiki:Protect-cascadeon in a div for identification
* (bug 18438) Tweak HTML for preview bar for consistency and accessibility
* (bug 18432) Updated documentation for dumpBackup.php
* Fix array logic in Sanitizer::removeHTMLtags so that it doesn't strip good
  tags that were redundantly defined.
* (bug 14118) SpecialPage::getTitleFor does not return a localised name
* (bug 18698) Renaming non entry point maintenance scripts from .inc.php to
  .inc
* Deprecated methods Title::getInterwikiLink, Title::userCanCreate(),
  Title::userCanEdit() and Title::userCanMove() have been removed
* Only show upload links on file description if $wgEnableUploads = true
  and user can upload
* Don't say "You need to log in to upload/move", because it's possible that
  uploading/moving is disabled for registered users as well (e.g. only sysops)
* (bug 18943) Handle invalid titles gracefully at Special:Mostlinked
* (bug 8873) Enable variant conversion in text on 'alt' and 'title' attributes
* (bug 10837) Introducing the StubUserVariant class to determine the variant
  variable instead of using this to overrules the user language preference.
* (bug 19014) If user had deletedhistory right, but not undeleted right, then
  show "view" instead of "view/restore" on logs.
* (bug 19017) TOC level calculation error in an odd case
* (bug 18999) CSS update for RTL interwiki links
* (bug 18925) history.js removes class names of list elements on initialization
* Multiple whitespace in TOC anchors is now stripped, for consistency with the
  link from the edit comment
* (bug 19112) Preferences now respects $wgUseExternalEditor
* (bug 18173) MediaWiki now fails when unable to determine a client IP
* (bug 19170) Special:Version should follow the content language direction
* (bug 19160) maintenance/purgeOldText.inc is now compatible with PostgreSQL
* Fixed performance regression in "bad image list" feature
* Show user preference 'Use live preview' if $wgLivePreview is enabled only
* (bug 17014) Blocked users can no longer use Special:UserRights unless they
  can add/remove *all* groups (have 'userrights' permission).
* (bug 19294) Always show Sp-contributions-footer(-anon)
* Attempts to restrict reading of pages while anonymous viewing is allowed
  via extensions not using the userCan hook and via $wgRevokePermissions now
  work.
* (bug 8445) Multiple-character search terms are now handled properly for
  Chinese
* (bug 19450) Use formatNum for "Number of edits" in Special:Preferences
* (bug 11242) Check for MySQL storage engines during installation now checks
  whether the engines are actually available
* (bug 19390) Omit the "printable version" link on the printable version
* (bug 18394) img_auth.php now respects userCan
* (bug 19509) Uploading to a file named '0' previously treated it as null input
   and attempted to upload with the source name. Now warns about not having an
   extension (since 0.ext is perfectly valid)
* (bug 19468) Enotif preferences are now only displayed when they are turned on
* (bug 19442) Show/hide options on watchlist only work once
* (bug 19602) PubMed Magic links now use updated NIH url
* (bug 19637) externallinks have links to self
* Don't load Opera 9.5 RTL fixes for Opera 9.6
* Remove five-year-old KHTMLFixes.css, which is unlikely to be relevant anymore
  and was causing problems.
* Removed repetition of URIs in the title attributes of external links.
* (bug 19693) User name is now escaped in "Contributions for ..." link on
  Special:BlockIP
* (bug 19571) Override buildConcat for SQLite.
* Log in and log out links no longer return to page view when clicked from
  history view, edit page, or something similar
* (bug 19513) RTL fixes for new Search UI
* (bug 16497) Special:Allmessages is paginated
* (bug 18708) CSS plainlinks class now available to all skins
* (bug 19590) Database error messages no longer have "MySQL" hardcoded as the
  database type
* (bug 19759) successbox on Special:Preferences now correctly aligned on
  standard, nostalgia and cologneblue skin
* (bug 19814) interwiki links from file links ([[File:Foo.jpg|link=de:Test]])
  are no longer recorded in the pagelinks table
* (bug 19784) date option "ISO 8601" produced illegal id
* (bug 19761) Removed autogenerated <meta keywords> tag with link data.
  Keyword set was not useful, and is ignored by modern search engines anway.
* (bug 19827) Special:SpecialPages title is "Upload file
* (bug 19355) Added .xhtml, .xht to upload file extension blacklist
* (bug 19287) Workaround for lag on history page in Firefox 3.5
* (bug 19564) Updated docs/hooks.txt
* (bug 18751) Fix for buggage in profiling setup for some extensions on PHP 5.1
* (bug 17139) ts_resortTable inconsistent trimming makes date sorting fragile
* (bug 19445) Change oldimage table to use ON UPDATE CASCADE for FK to image
  table.
* (bug 14080) Short notation links to subpages didn't work in edit summaries
* (bug 17374) Special:Export no longer exports multiple copies of pages
* (bug 19818) Edits to user CSS/JS subpages can now be marked as patrolled by
  users who can't edit them
* (bug 19839) Comments in log items are no more double escaped
* (bug 18161) Fix inconsistent separators in watchlist link toolbars with
  "enhanced recent changes"
* (bug 16877) Moving a page over a redirect no longer leaves an orphan entry in
  the recentchanges table
* (bug 16009) Limit selection forms based on Pager now links to the correct page
  when using long urls
* The display of the language list on the preferences is more comply with the
  BCP 47 standards.
* (bug 19849) Custom X-Vary-Options header now disabled unless $wgUseXVO is set
* (bug 19301) Duplicates entries in $wgAddGroups, $wgRemoveGroups,
  $wgGroupsAddToSelf and $wgGroupsRemoveFromSelf are no more displayed on
  Special:ListGroupRights
* (bug 18799) Special:Userlogin now handles correctly the returnto parameter
  to not link back to Special:Userlogout when user's language isn't the same as
  content's language
* (bug 19479) Show proper error message when unable to connect to PostgreSQL
  database with username/password in MediaWiki's setup
* (bugs 18407, 18409) Special:Upload is now listed on Special:Specialpages only
  if uploads are enabled and the user can access it
* (bug 17988) Spaces before [[Category:]] links are no longer ignored
* (bug 19957) All known-failing tests now marked disabled; added --run-disabled
  option to parser test suite to run disabled tests if desired.
* (bug 16311) Make recent change flags (n/m/b) <abbr>s instead of <span>s
* (bug 15680) Split the edit tip message of user CSS/JS subpage into
  "usercssyoucanpreview" and "userjsyoucanpreview" respectively.
* (bug 12110) Split the rights for editing users' CSS/JS subpage from
  "editusercssjs" into "editusercss" and edituserjs" respectively.
* (bug 19394) RecentChanges feed URLs for log items with no revisions
  (eg Newuser, Userrights) are no longer broken
* (bug 17395) Remote file descriptions use user language ($wgLang), not wiki
  language ($wgContLang)
* (bug 11867) Lock error on redirect table when running orphans.php
* (bug 18930) initStats.php now refreshes active users count
* (bug 18699) Using the nosummary URL option no longer triggers the "You have
  not provided a summary" warning for those who activated it in their
  preferences
* (bug 18855) commandLine.inc and Maintenance.php are now properly included
  using the full path
* (bug 18497) Fixed broken style sheets in Opera fullscreen mode
* (bug 16084) Default memory limit has be increased to 50M, see $wgMemoryLimit
* (bug 17864/19519) Added proper input normalization in Special:UserRights
* (bug 20086) Add Hook to add extra statistics at the end of Special:Statistics
* (bug 19289) importDump.php can now handle bzip2 and 7zip
* (bug 20131) Fixed a PHP notice for users having the "rollback" right on
  Special:RecentChangesLinked
* Do not transform EXIF fields with pure text to avoid results like
  foo,bar@example,com
* (bug 20176) Fix login/logout links in skin CologneBlue
* (bug 20203) "Powered by Mediawiki" now has height/width on image tag
* (bug 20273) Fix broken output when no pages are found in the content
  namespaces
* (bug 20265) Make AncientPages and UnusedFiles work on SQLite
* Fixed XSS vulnerability for Internet Explorer clients (only pre-release
  versions of MediaWiki were affected).
* (bug 14817) Moving a page to a subpage of itself moves it twice
* (bug 20289) $wgMaximumMovedPages should only count pages actually moved
* (bug 15248) Non-breaking spaces and certain other Unicode space characters
  are now normalized to ordinary spaces in titles; if your wiki has existing
  titles with such characters, run cleanupTitles.php and/or cleanupImages.php
* (bug 11143) Links containing invalid UTF-8 percent-code sequences are now
  cleanly disabled instead of breaking parsing entirely on PHP 5.2.
* (bug 20296) Fixed an PHP warning in Language::getMagic() in PHP 5.3
* (bug 20358) Unprotect tab was missing accesskey; now same as protect tab.
* (bug 20317) Cleaned up default main page link accesskey settings
* (bug 20362) Special:Statistics now produces valid HTML when view counters are
  enabled
* (bug 19857) maintenance/deleteRevision.php on last revision no longer breaks
  target page
* (bug 20365) Page name with with c/g/h/j/s/u + x are now correctly handled in
  Special:MovePage with Esperanto as content language
* (bug 20364) Fixed regression in GIF metadata loading
* (bug 20299) MediaWiki:Move-subpages and MediaWiki:Move-talk-subpages can now
  use wikitext
* (bug 15475) DatabaseBase::setFlag(), DatabaseBase::clearFlag() and
  DatabaseBase::getFlag() now have documentation
* (bug 19966) MediaWiki:License-header is now used for the licensing header in
  the file description page instead of MediaWiki:License
* (bug 20380) Links to history/deleted edits at the top of
  Special:RevisionDelete are no more displayed when when doing log suppression
* (bug 8143) Localised parser function names are now correctly case insensitive
  if they contain non-ASCII characters
* (bug 19055) maintenance/rebuildrecentchanges.php now purges
  Special:Recentchanges's RSS and Atom feed cache
* The installer will now try to bypass PHP's max_execution_time
* (bug 20260) SQLite no longer tries to automatically create the database at
  execution time, this now happens only at install time; if it is not available
  at script execution, it now throws an exception
* Fixed EditFilterMerged hook so the hookError parameter serves a purpose
  (analogous to EditFilter hook)
* (bug 2257) Tag extensions can expand template parameters provided to the tag,
  by using a new parameter added to the recursiveTagParse function
* (bug 14900) __INDEX__ and __NOINDEX__ no longer override site config set in
  $wgArticleRobotPolicies.
* (bug 20466) Hidden categories are no more displayed when printing
* (bug 20446) When changing user rights with User@remotewiki and remotewiki is
  the local wiki, the user is now treated as the local user
* (bug 20494) OutputPage::getArticleBodyOnly() no longer requires an useless
  argument
* (bug 20136) Protection form JavaScript now synchronizes the expiry boxes on
  any change, in addition to onkeyup.
* Don't link to "edit this page" on MediaWiki:Noarticletext if user is not
  allowed to create page. Done via new message
  MediaWiki:Noarticletext-nopermission
* Improved compatibility between the Vector skin and addPortletLink() from
  wikibits.js: empty portlets are now present but hidden, adding an element to a
  portlet unhides it
* (bug 19531) addPortletLink() now wraps inserted labels in a <span> element to
  be compatible with the CSS for the Vector skin
* (bug 20578) Wrong localized image metadata - duplicated string?
* (bug 20556) Stub threshold's "other" <input> in Special:Preferences now has a
  correct type="text" parameter
* (bug 482) Don't include TOC in the printable version if it has been hidden
* Adjust the time according to the user configuration on Special:Revisiondelete
* (bug 20624) Installation no longer allows "qqq" as the chosen language
* (bug 20634) The installer-created database user will now have all rights on
  the database so that upgrades will go more smoothly.
* (bug 18180) Special:Export ignores limit, dir, offset parameters
* User::getBlockedStatus() works for all kinds of user objects and doesn't
  assume the user object is equal to the current-user object ($wgUser)
* (bug 20517) Cancel link from edit page now returns to the old version when
  editing an old version
* (bug 16902) Installer no longer shows warnings when exec() has been disabled
  by disable_functions
* (bug 20726) Title::getLatestRevID's documentation now says that the function
  returns false if the page doesn't exist
* (bug 20751) ForeignApiRepo now urldecodes filenames when saving to local cache
* (bug 20730) Fix to Special:Version ViewVC link for branch checkouts
* (bug 20353) wfShellExec() was adding extra quotes on Windows Vista, causing
  command line scripts to fail
* (bug 20702) Parser functions can now be used correctly in
  MediaWiki:Missing-article
* (bug 14117) "redirected from" is now also shown on foreign file redirects
* (bug 17747) Only display thumbnail column in file history if the image can
  be rendered.
* (bug 3421) Live preview no longer breaks user CSS/JS previews
* (bug 11264) The file logo on a file description page for documents (PDF, ...)
  now links to the file rather than the file description page
* Password fields built with HTMLForm now still have the type="password"
  attribute if $wgHtml5=false.
* (bug 20836) Preload now works for MediaWiki namespace
* (bug 20885) Search box no longer suggests unavailable special pages
* (bug 20948) "Create this page" on Special:Search is no longer displayed when
  searching for special pages
* (bug 20524) Hideuser: Show nice error when trying to block hidden user without
  hideuser right
* (bug 21026) Fixed file redirects on shared repos on non-English client wikis
* (bug 21030) Fixed schema choices from being overwritten by defining unique
  field names per driver.
* (bug 21115) wgCanonicalSpecialPageName javascript variable is now always
  false on non-special pages
* (bug 21113) "Other statistics" header on Special:Statistics is no more
  displayed when there isn't any entry in it
* (bug 21114) Special:Contributions no longer shows diff links for new
  revisions
* (bug 21116) MediaWiki:Templatesused, MediaWiki:Templatesusedpreview and
  MediaWiki:Templatesusedsection now support plural
* (bug 21079) There is no more line wrapping between label and field in
  Special:Log
* (bug 20256) Fixed SQL errors on Special:Recentchanges and
  Special:Recentchangeslinked on SQLite backend
* (bug 20880) Fixed updater failure on SQLite backend
* (bug 21182) Fixed invalid HTML in Special:Listgrouprights
* (bug 20242) Installer no longer promts for user credentials for SQLite
  databases
* (bug 20911) Installer failed to create a SQLite database
* (bug 20847) Deprecated deprecated akeytt() removed in wikibits.js leaving
  dummy
* (bug 21161) Changing $wgCacheEpoch now always invalidates file cache
* (bug 20268) Fixed row count estimation on SQLite backend
* (bug 20275) Fixed LIKE queries on SQLite backend
* (bug 21234) Moving subpages of titles containing \\ now works properly
* (bug 21006) maintenance/updateArticleCount.php now works again on PostgreSQL
* (bug 19319) Add activeusers-intro message at top of SpecialActiveUsers page
* (bug 21255) Fixed hostname construction for DNSBL checking
* (bug 18019) Users are now warned when moving a file to a name in use on a
  shared repository and only users with the 'reupload-shared' permission can
  complete the move.
* (bug 18909) Add missing Postgres INSERT SELECT wrapper
* User::isValidPassword now only returns boolean results,
  User::getPasswordValidity can be used to get an error message string
* The error message shown in Special:ChangePassword now parses wiki markup
* (bug 19859) Removed experimental HTMLDiff feature
* Removed section edit links in edit conflict form
* Allow SpecialActiveusers to work on non-MySQL databases
* (bug 6579) Fixed protecting images from uploading only
* (bug 18609) Search index was empty for some pages
* (bug 13453) rebuildrecentchanges maintenance script works on PG again
* (bug 16583) Reduce false positives when checking for PHP (on upload, etc.)
* (bug 20112) Bitrotted tests in the t/ directory were failing.
* (bug 21470) MediaWiki:Sp-contributions-explain is now wrapped in a <p> with
  id "mw-sp-contributions-explain"
* (bug 19159) Fixed \overleftrightarrow in texvc
* (bug 19391) Fix caching for Recent ChangesFeed.
* (bug 21455) Fixed "Watch this page" checkbox appearing on some special pages
  even to non-logged in users
* (bug 21551) Rewrote the Squid purge HTTP client to provide a more robust and
  general implementation of HTTP, allowing it to purge non-Squid caches such as
  Varnish.
* Fixed corruption of long UDP debug log messages by using socket_sendto()
  instead of fsockopen() with fwrite().
* (bug 16884) Fixed feed links in sidebar not complying with URL parameters
  of the displayed page
* (bug 21403) memcached class renamed to MWMemecached to avoid conflict with
  PHP's memcached extension
* (bug 21650) Both calls to SkinTemplateTabs hook are now compatible
* (bug 21672) Add missing Accept-Language to both Vary and XVO headers
* (bug 21679) "Edit block reasons" link at the bottom of Special:Blockip is now
  only displayed to the users that have "editinterface" right
* (bug 21740) Attempting to protect a page that doesn't exist (salting) returns
  "unknown error"
* (bug 18762) both redirects and links get fixed one after another if
  redirects-only switch is not present
* (bug 20159) thumbnails rerendered if older that $wgThumbnailEpoch
* Fixed a bug which in some situations causes the job queue to grow forever,
  due to an infinite loop of job requeues.
* (bug 21523) File that can have multiple pages (djvu, pdf, ...) no longer have
  the page selector when they have only one page
* (bug 21559) "logempty" message is now wrapped in a div with class
  "mw-warning-logempty" when used in log extract
* (bug 20549) Parser tests were broken on SQLite backend
* (bug 21776) Interwiki urls like http://en.wikibooks.org/wiki/cs: should give
  a redirect instead of a baderror.
* (bug 21803) Special:MyContributions now keeps the query string parameters
* Redirecting special pages now keep query string paramters set to "0" (e.g.
  for namespace)
* (bug 20765) Special:ListGroupRights no longer misses addables and removables
  groups if there are duplicate entries
* (bug 21814) Message shown when rolling back an edit with a deleted username
  now shows '(username deleted)' instead of broken user tool links
* (bug 21536) Fixed JavaScript error on Special:Search caused by an incorrect ID
* (bug 21535) RecentChanges RSS feed now always recognises the namespace filter,
  previously it sometimes didn't due to caching.
* (bug 20388) ProfilerSimpleText no longer outputs comment on action=raw
* refreshLinks.php now purges orphaned redirect table rows
* (bug 2971) Swap links of hist & diff location on Special:Contributions for
  consistency with RC/WL
* (bug 21986) Special page names were are now capitalized by content language
* If two log type have the same description, they're now both displayed in the
  type selector on Special:Log
* (bug 20115) Special:Userlogin title says "Log in / create account" even if the
  user can't create an account
* (bug 2658) Don't attempt to set the TZ environment variable.
* (bug 9794) User rights log entries for foreign user now links to the foreign
  user's page if possible
* (bug 14717) Don't load nonexistent CSS fix files for non-Monobook skins
* (bug 22034) Use wfClientAcceptsGzip() in wfGzipHandler instead of
  reimplementing it.
* (bug 19226) First line renders differently on many UI messages.
* (bug 21303) Comments are no longer stripped from MediaWiki:Common.js and
  skin-specific JS pages
* (bug 5061) Use the more precise thumbcaption thumbimage and thumbinner classes
  for image divs.
* Fixed bug involving unclosed "-{" markup in the language converter
* (bug 21870) No longer include Google logo from an external server on wiki error.
* (bug 22181) Do not truncate if the ellipsis actually make the string longer
* (bug 16039) Text disappearing after a bad image
* (bug 18784) Internal links like [[File:Foo|caption]] should read 'caption',
  not 'File:Foo' when Foo is not an image
* (bug 21518) Special:UserRights no longer displays the user name box for users
  that can only change their rights
* (bug 21593) Special:UserRights now lists automatic groups membership
* (bug 22364) Setting $wgUseExternalEditor to false no longer hides the reupload
  link from file pages
* Fix bug introduced in MediaWiki 1.12: The author field in
  $wgExtensionCredits is no longer sorted with sort() but rather used
  as it appears in extensions as was the case before r30117 where it
  was unintentionally sorted along with other fields.
* (bug 19334) Textarea no longer jumps when editing longer articles in IE8
* Truncate summary of page moves in revision comment field to avoid broken
  multibyte characters
* (bug 22540) ForeignApiRepos no longer try to store thumbnails that don't exist
* (bug 22551) Special:Resetpass now has a "Cancel" button that sends the user to 
  the page set in the &returnto parameter.
* (bug 19194) Search box in Modern skin doesn't focus with Safari/Chrome
* (bug 17790) Users instantly logged off on HughesNet

== API changes in 1.16 ==
* Added uiprop=changeablegroups to meta=userinfo
* Added usprop=gender to list=users
* (bug 18311) action=purge now works for images too
* Add parentid to prop=revisions output
* (bug 17832) action=delete returns 'unknownerror' instead of 'permissiondenied'
  when the user is blocked
* (bug 18546) Added timestamp of new revision to action=edit output
* (bug 18554) Also list hidden revisions in list=usercontribs for privileged
  users
* (bug 13049) "API must be accessed from the primary script entry point" error
* (bug 16422) Don't display help for format=jsonfm unless specifically requested
* Added PHP and database version to meta=siteinfo output
* (bug 18533) Add readonly message to meta=siteinfo output
* (bug 18518) Add clprop=hidden to prop=categories
* (bug 18710) Fixed internal error with empty parameter in action=paraminfo
* (bug 18709) Missing descriptions for some parameters in action=paraminfo
  output
* (bug 18731) Show correct SVN links for extension modules in api.php?version
* (bug 18730) Add version information to action=paraminfo output
* (bug 18743) Add ucprop=size to list=usercontribs
* (bug 18749) Add generator flag to action=paraminfo output
* Make action=block respect $wgEnableUserEmail and $wgSysopEmailBans
* Made deleting file description pages without files possible
* (bug 18773) Add content flag to siprop=namespaces output
* (bug 18785) Add siprop=languages to meta=siteinfo
* (bug 14200) Added user and excludeuser parameters to list=watchlist and
  list=recentchanges
* Added index, fromtitle and byteoffset fields to action=parse&prop=sections
  output
* (bug 19313) action=rollback returns wrong revid on master/slave setups
* (bug 19323) action=parse doesn't return section tree on pages with Cite
  warnings
* (bug 18720) Add anchor field to action=parse&prop=sections output
* (bug 19423) The initial file description page used caption in user lang
  rather than UI lang
* (bug 17809) Add number of users in user groups to meta=siteinfo
* (bug 18533) Add readonly reason to readonly exception
* (bug 19528) Added XSLT parameter to API queries in format=xml
* (bug 19040) Fix prependtext and appendtext in combination with section
  parameter in action=edit
* (bug 19090) Added watchlist parameter, deprecated watch and unwatch
  parameter in action=edit
* Added fields to list=search output: size, wordcount, timestamp, snippet
* Where supported by backend, list=search adds a 'searchinfo' element with
  optional info: 'totalhits' count and 'suggestion' alternate query term
* (bug 19907) $wgCrossSiteAJAXdomains added to allow specified (or all)
  external domains to access api.php via AJAX, if the browser supports the
  Access-Control-Allow-Origin HTTP header
* (bug 19999) Made metadata and properties of search results optional. Added
  srprop and srinfo.
* (bug 20700) Add amprop=default to meta=allmessages to list default value for
  customized messages
* Don't parse magic words in meta=allmessages, output messages unparsed
* (bug 21105) list=usercontribs can now list contribs for User:0
* (bug 21085) list=deletedrevs no longer returns only one revision when
  drcontinue param is passed
* (bug 21106) Deprecated parameters now tagged in action=paraminfo
* (bug 19004) Added support for tags
* (bug 21083) list=allusers no longer returns current timestamp for users
  without registration date
* (bug 20967) action=edit allows creation of invalid titles
* (bug 19523) Add inprop=watched to prop=info
* (bug 21589) API: Separate summary and initial page text for uploads
* (bug 21817) list=usercontribs returns empty result for empty ucuser
* (bug 21441) meta=userinfo&uiprop=options no longer returns default options
  for logged-in users under certain circumstances
* (bug 21945) Add chomp control in YAML
* Expand the thumburl to an absolute url to make it consistent with url and
  descriptionurl
* (bug 20233) ApiLogin::execute() doesn't handle LoginForm :: RESET_PASS
* (bug 22061) API: add prop=headitems to action=parse
* (bug 22240) API: include time in siteinfo
* (bug 22241) Quick edit is still using the deprecated watch parameter (API: Setting default for watch/unwatch wrongly set)
* (bug 22245) blfilterredirect=nonredirects in blredirect mode wrongly filtering
* (bug 22248) Output extension URLs in meta=siteinfo&siprop=extensions
* Support key-params arrays in 'descriptionmsg' in meta=siteinfo&siprop=extensions
* (bug 21922) YAML output should quote asterisk when used as key
* (bug 22297) safesubst: to allow substitution without breaking transclusion
* (bug 18758) API read of watchlist's wl_notificationtimestamp
* (bug 20809) Expose EditFormPreloadText via the API
* (bug 18427) Comment (edit summary) parser option for API
* (bug 18608) API should provide list of CSS styles to apply to rendered output
* (bug 18771) List possible errors in action=paraminfo

=== Languages updated in 1.16 ===

MediaWiki supports over 330 languages. Many localisations are updated
regularly. Below only new and removed languages are listed, as well as
changes to languages because of MediaZilla reports.

* Capiznon (cps) (new)
* North Frisian (frr) (new)
* Kirmanjki (kiu) (new)
* Komi-Permyak (koi) (new)
* Karachay-Balkar (krc) (new)
* Latgalian (ltg) (new)
* Hill Mari (mrj) (new)
* Prussian (prg) (new)
* Romagnol (rgn) (new)
* Rusyn (rue) (new)
* Lower Silesian (sli) (new)
* Picard (pcd) (new)
* Uyghur (Arabic script) (ug-arab) (new)
* Upper Franconian (vmf) (new)
* Votic (vot) (new)
* Eastern Yiddish (ydd) (removed)
* Iriga Bicolano (bto) (removed)
* Ladin (lld) (removed)
* Palembang (plm) (removed)
* Megleno-Romanian (Greek script) (ruq-grek) (removed)
* Tamazight (tzm) (removed)

* (bug 18474) Sorani (ckb - Central Kurdish) (renamed from ku-arab)
* Add PLURAL function for Scots Gaelic (gd)
* Add Estonian letters äöõšüž to linktrail (et)
* (bug 18776) Native name of Burmese language (my)
* (bug 18806) Use correct unicode characters in spelling of native Chuvash
  (Чӑвашла)
* (bug 18864) Updated autonym for Zhuang language
* (bug 18308) Updated date formatting in Occitan (oc)
* (bug 19080) Added ăâîşţșțĂÂÎŞŢȘȚ to Romanion (ro) linktrail
* (bug 19286) Correct commafying function in Polish (pl)
* (bug 19441) Updated date formatting for Lithuanian
* (bug 19630) Added ÄäÇçĞğŇňÖöŞşÜüÝýŽž to Turkmen (tk) linktrail
* (bug 19949) New linktrail for Greek (el)
* (bug 19809) Korean (North Korea) (ko-kp) (new)
* (bug 19968) Fixed "Project talk" namespace name for Maltese (mt)
* (bug 21168) Added áâãàéêçíóôõúü to Portuguese (pt) linktrail
* (bug 21596) Change interwiki link for Kurdish (ku)

== Compatibility ==

MediaWiki 1.16 requires PHP 5.1 (5.2 recommended). PHP 4 is no longer supported.

MySQL 3.23.x is no longer supported; some older hosts may need to upgrade.
At this time we still recommend 4.0, but 4.1/5.0 will work fine in most cases.


== Upgrading ==

1.16 has several database changes since 1.15, and will not work without schema
updates.

If upgrading from before 1.11, and you are using a wiki as a commons reposito-
ry, make sure that it is updated as well. Otherwise, errors may arise due to
database schema changes.

If upgrading from before 1.7, you may want to run refreshLinks.php to ensure
new database fields are filled with data.

If you are upgrading from MediaWiki 1.4.x or earlier, some major database
changes are made, and there is a slightly higher chance that things could
break. Don't forget to always back up your database before upgrading!

See the file UPGRADE for more detailed upgrade instructions.


=== Caveats ===

Some output, particularly involving user-supplied inline HTML, may not
produce 100% valid or well-formed XHTML output. Testers are welcome to
set $wgMimeType = "application/xhtml+xml"; to test for remaining problem
cases, but this is not recommended on live sites. (This must be set for
MathML to display properly in Mozilla.)

For notes on 1.15.x and older releases, see HISTORY.


=== Online documentation ===

Documentation for both end-users and site administrators is currently being
built up on MediaWiki.org, and is covered under the GNU Free Documentation
License (except for pages that explicitly state that their contents are in
the public domain) :

  http://www.mediawiki.org/wiki/Documentation


=== Mailing list ===

A MediaWiki-l mailing list has been set up distinct from the Wikipedia
wikitech-l list:

  http://lists.wikimedia.org/mailman/listinfo/mediawiki-l

A low-traffic announcements-only list is also available:

  http://lists.wikimedia.org/mailman/listinfo/mediawiki-announce

It's highly recommended that you sign up for one of these lists if you're
going to run a public MediaWiki, so you can be notified of security fixes.


=== IRC help ===

There's usually someone online in #mediawiki on irc.freenode.net
