Prevent some glitches with laggy clients :>
Disable gcc optimisation causing release builds to crash on client join. Thanks to teh for pointing it out
Adds gcc fix for compiling with -O3 (-fno-tree-vectorize needed).
Apparently this issue was caused by turning on sse stuff according to gcc docs.
Should fix #358 and #355 fully.
Reverting SP's sv_fps back to 20 from 40.  Game code never was changed to suit this.
From original commit b80e275.
Fixed the infamous saber lock crash.
Fixed fast teamswitch bypass exploit with follow commands.