[MP] Rend2: Merge ioquake/ioq3@5fabc28dff78f2c9908bc4b915f904c82436627c :
OpenGL2: Fix rendering when r_hdr = 0 and r_floatLightmap = 1
[MP] Rend2: Use correct defaults for r_overBrightBits and r_mapOverBrightBits to be in line with vanilla renderer.