[MP] Rend2: Fix spacing in RE_StretchPic
Merge branch 'master' into rend2
[MP] Rend2: Moved console commands in the renderer to an array to avoid forgetting to remove commands at shutdowns.
Also refactored maxpolys/maxpolyverts initialization.
Merge branch 'master' into rend2
Merge branch 'master' into rend2
[MP] Rend2: Enable forcesight surfaces in rend2 as well.
[MP] Rend2: Don't load external GLSL files by default

External GLSL should probably only be used for development testing,
not released products. The GLSL files are tied to the code, and the
code changes some what often.

Fixes using OpenArena 0.8.8 which has incompatible GLSL files in a pk3.
[MP] Rend2: Fix SkipBracedSection after a previous master branch merge.
Merge branch 'master' into rend2
[MP] Rend2: Support normalmaps with animmap.
All images in the animmap should be normalmap if you set the stage for it.
[MP] Rend2: Add missing tr_types.h header to rd-common files.
Merge branch 'master' into rend2
Merge remote-tracking branch 'upstream/rend2' into rend2