* Doesn't compile yet! Just splitting this up logically so the change is
a bit easier to digest.
* I've commented and organised a bit better the gl_hookset.h hook list.
* The function hooks are set up for all of the ARB_dsa entry points.
Those that are semnatically identical to EXT_dsa are set up as aliases
(with EXT_ being canonical, so we can fall back if ARB_dsa isn't
supported - see comments in gl_hookset.h).
* Implemented the new functions except for the glTexture* family and the
glCreate* family. No deduplication of code yet.
* As with EXT_dsa we "promote" to the DSA function for serialisation,
but since unlike EXT_dsa we can't assume ARB_dsa is present, instead
we emulate those functions that we might use unconditionally but may
not be present.
* Now instead of returning NULL for entry points that we don't support and
hoping the application will handle that or error out, instead we return
a function that will log an error if it is ever called, and then pass
through to the real function. In most cases, the capture will probably be
broken as whichever function isn't saved.
* hookset.pl is much faster too, it outputs the whole gl_hookset_defs.h
file and doesn't do multiple searches over the whole set of headers in
official/ for each function.
* Remove legacy wrapped functions that were only hacked-in to get
glxgears working as a proof of concept.
* Split out groups of wrapped functions into separate files by type
baldurk