The following files are licensed other than under the GPL:

data/texpages/bdrops/backdrop5.png
data/texpages/bdrops/backdrop6.png
	- CC BY SA 3.0	- Copyright (c) 2007-2008 "B. V. Edwards" <cathuria>
data/base/texpages/page-25-sky-urban.png
	- CC0, original work by cybersphinx
data/mods/global/newst_tiles/
	- CC BY SA 3.0	- Copyright (c) 1999-2004 N.E.W.S.T., permission by "Frank Lamboy" <rman>
lib/framework/tagfile.*
	- Public Domain
lib/netplay/miniupnpc/*
	- BSD, copyright Thomas Bernard (http://miniupnp.free.fr)
