Add numerous 'get'-type functions to most of the enums supported by the

Add numerous 'get'-type functions to most of the enums supported by the
server-side GLX implementation.

Correct the protocol for EXT_convolution.  Several functions were
incorrectly listed as 'sop' that should have been 'vendorpriv'.

Remove TexParameter[if]v from the list of functions associated with
TEXTURE_RESIDENT.  The state associated with this enum is read-only.

Sort the enums by value for each particular size.  This ensures that the
signature is the same no matter what the ordering is of the enums in the XML
file.  The side effect is that there are some extra changes in
indirect_size.c.