libGL libGLU and libglut should be in a seprate GL package and the headers
should be in a seperate -devel package.

Why?
-People who use cards which only work with old 3.3 servers might want a
software OpenGL (Mesa), the software GL in 4.0 doesn't work with a 3.3
server
-People like me with an 3dfx Voodoo 2 will want a Mesa compiled for
their VooDoo as opengllib, not the default XF40 implementation
-Some people might want to use an commercial OpenGL

If this package should obsolete Mesa like the current XFree-libs-4.0 does
is discutable.