[bug#41967] [PATCH] gnu: Add tesseract.

[Kei]

On Sat, 2020-06-27 at 08:57 +0200, Pierre Neidhardt wrote:
> Indeed.
> 
> The question is: does Tesseract reuse any of the media from
> Sauerbraten?
> 

It doesn't seem like it, though I did come across some useful licensing
info for some of Tesseract's assets:

* media/sky/0ptikz/info.txt: Non-commerical clause
* media/model/mapmodel/dcp/blade_x/Readme.txt: "Cube-only, let me know
otherwise" license
* media/model/mapmodel/nobiax/info.txt: No license, but suspected CC0
1.0 (evidence: https://github.com/red-eclipse/nobiax)
* media/sound/mapsound/soundtransit/info.txt: CC-BY 2.0 according to 
http://web.archive.org/web/20160421054815/http://archive.turbulence.org/soundtransit/search/
* media/sound/mapsound/freesound.org/info.txt:
** alaskarobotics_ambient-spacecraft-hum.ogg: CC0 1.0 (
https://freesound.org/people/AlaskaRobotics/sounds/221570/)
** cascading-water.ogg: CC0 1.0 (
https://freesound.org/people/KingBowser/sounds/253623/)
** cool_compressor_1.ogg: ?
** floresent-light_1.ogg: possibly CC0 1.0? (
https://freesound.org/people/rpew1/sounds/108476/)
** rain.ogg: ?
* media/sound/game/uphys/info.txt: CC-BY-NC 4.0
* media/sound/game/soundsnap/info.txt: Non-commercial clause (
https://www.soundsnap.com/licence)
* media/interface/crosshair/info.txt: Assume full copyright?
* media/texture/philipk2/info.txt: "Do-whatever" license
* media/texture/thesilentnight/info.txt: "Do-whatever-with-attribution" 
license

Also, it turns out that according to "src/readme_tesseract.txt", the
".cfg" files in the "data" directory are covered by the same license as
the code in "src".