[MP] Rend2: struct naming from vanilla.
[MP] Rend2: use NULL instead of nullptr in CCacheManager::LoadFile to be consistent and not forcefully require vs2010 here.
[MP] Rend2: Bye bye md4 models.
[SP] Remove unused md4 prototypes.
[MP] Remove unused md4 prototypes.
Merge branch 'master' into rend2
[MP] Rend2: Fix a remaining vec_t instance.
[MP] Rend2: Fix mini ref ent merge fail.
[MP] Rend2: Fully migrate the proper screenshot code and then some to rend2.