[PATCH 0/8] Attempt to fix GLX for OSX

[Adam Jackson]

This fixes up the indirect glx code to only call-by-name those symbols
present in the Linux OpenGL ABI, which corresponds to OpenGL 1.2.1.
Since that was available even on OSX 10.0 this should be sufficient for
xquartz as well.

Merely proven correct, not tested.  The xwin code assuredly needs
something similar.  I don't entirely understand the scary-looking comment
in there about stdcall, and I'm quite sure the existing code is broken
for multiple indirect contexts since wglGetProcAddress results are
context-sensitive unlike GLX.

- ajax