Remove additional acos and asin system call traps that I added in r119 (2012-09-15).
Now the implementations in bg_lib.c are used like when Q3Rally was a mod.
acos system call is part of Q3A CGame API. It's still used by Q3Rally CGame.
Attempting to run Q3Rally CGame VMs from Sep-2012 - Nov-2017 will now given an error.
ERROR: Bad cgame system trap: 112
OpenGL2: Use an OpenGL 3.2 core context if available
OpenGL2: Remove GLSL_ValidateProgram()
OpenGL2: Don't do MSAA resolve/shadow mask/SSAO on shadow views
OpenGL2: "Fix" cg_shadows 4
Fix score bonus for defending the flag carrier in CTF
Restore not giving defense score bonus to flag carrier
Add score bonus for defending the flag carrier in 1 Flag CTF
Move CON_Init ahead of Com_Init to avoid Windows dedicated server crash
Make 'globalservers 0' fetch all masters
OpenGL2: Don't use initialized arrays in glsl shaders
Echo server say/tell/sayto message to console
Don't try to remove non-existant command 'shaderstate'
Update internal curl to 7.54.0
Silence g_util.c warning about set but not read variable
Remove unused imgFlag_t value IMGFLAG_SRGB
Make warmup in Team Deathmatch wait for players to join both teams
Remove CVAR_PROTECTED from cl_renderer
Fix/improve buffer overflow in MSG_ReadBits/MSG_WriteBits
Fix friction in AAS_ClientMovementPrediction
Fix floating point precision loss in renderer
Reject OpenGL contexts w/ software renderer when core context requested
