Fix compilation errors for dedicated server
Fix JPEG screenshots
Fix compilation of cl_null.c
Meh
Fix compilation issues

I really hate the way irc module was designed!
Add rule for making ref_gl/*.o files
Remove DirectX settings, latest ming seems to have DirectX SDK bundled
Add make rule to build OS-specific files for ref_gl
Fix linking flags for ref_gl
Add include guard
Fix GLimp_SetMode_Real calls
unix Makefile fixes
OOPS