---- Changes since 1.130 ----
Improved the code for finding the openssl program for generating certificates.
Added the ability to restrict allowed Unix users who can login as Webmin users.
---- Changes since 1.150 ----
Added a Module Config option for an alternate user and group list display, which takes up less space on systems with a large number of Webmin users.
---- Changes since 1.160 ----
When editing a Webmin user or group, modules are now displayed under category headings.
---- Changes since 1.170 ----
Added a button to the user editing page for switching the current Webmin login to that user, without needing to know his password.
---- Changes since 1.180 ----
Added module hiding button to the group page, as in the user page.
---- Changes since 1.190 ----
Users and groups can now be backed up using the Backup Configuration Files module.
---- Changes since 1.200 ----
Users and groups with the same name can now be created. Internally, Webmin now uses .gacl files instead of .acl to store group ACL settings.
---- Changes since 1.210 ----
Enhanced the  Unix User Authentication page to allow different access to be granted to different users and group members.
---- Changes since 1.220 ----
Users can now be temporarily locked without their passwords being lost.
---- Changes since 1.230 ----
CIDR-format network addresses can now be used in the IP access control field.
The inactivity logout time can now be set on a per-Webmin user basis, rather than the global setting in the Webmin Configuration module applying to all users.
---- Changes since 1.250 ----
Added checkboxes and buttons on the module's main page for deleting several users and groups at once.
Webmin users created and managed by other modules can be marked as non-editable, to prevent them from being edited when any changes would be over-written.
The IP addresses of connected users are displayed on the sessions page.
