Possible overflow when loading models; overlap with fake model handles.

This adds MAX_SUBMODELS, initially set to 512. This avoids breaking netcode
compat.

The fake handles for box and capsule are adjusted so as to be outside the
submodel handle range.

Closes: #268, #269, #270

Ref. https://github.com/zturtleman/spearmint/commit/d1c612ee3623a6b25050f0c913a713184f7cf859
Remove an obsolete config file.
Don't error out when asked to render weapon icon WP_NONE.
Print a message about unknown command on the dedicated server
Extend the FXAA compile failure workaround to all Mesa given OpenGL < 3.0.

This is a shader bug, not a compiler bug; once fixed, it should be safe to
remove this workaround.
Merge remote-tracking branch 'remotes/origin/master' into gameplay/viech
HUDs are ugly, fix this a little.
Light Armour: Head 1.0 → 0.8, Nonlocational 0.6 → 0.5. Pounce damage 75 → 70.