This patch has been open for quite a while! Which is a shame because it
works well.

The license talked about seems to be GPL2+, see this commit:

https://github.com/xonotic/xonotic/commit/12105b36a21e7472f72933b6dd409465b5133396

They recently changed it to GPL3+, but this current release in the
patch is still GPL2+.

Is it alright if I make those changes in the licenses and push?