This is a subset of csqc, with alternative entry points that can be invoked by compat wrappers.
Also added sv_gameplayfix_setmodelrealbox cvar. Default value of 1 matches QuakeSpasm, whereas a value of 0 matches vanilla quake's behaviour.
md3 support
quoth/etc bug fix
strzone bug fix
png/jpg replacement wall textures
rewrote mdl rendering to always use arrays, relaxing vertex+tri limits.
removed static ents limit
fixed ambient_level not working at high framerates.