* hw/kdrive/ephyr/ephyrglxext.c:
(ephyrGLXGetFBConfigsSGIX): proxy the GLXGetFBConfigsSGIX call.
It is a vendor extension to get the visual configs as a list of
name/value pairs.
(ephyrHijackGLXExtension): hijack the VendorPriv_dispatch_info
dispatch table to register our implementation of GLXGetFBConfigsSGIX
(ephyrGLXGetFBConfigsSGIXReal): added this where the real
implementation of GLXGetFBConfigsSGIX is. It support bytes swapping.
(ephyrGLXGetFBConfigsSGIX,ephyrGLXGetFBConfigsSGIXSwap): these are
the dispatch entry points. They just call
ephyrGLXGetFBConfigsSGIXReal.
* hw/kdrive/ephyr/ephyrhostglx.c,h: reorganize the proxies to get
visual params from the host so that they clearly support the different
methods of doing so.
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