[Mesa3d-dev] gallium-winsys-handle-rebased branch

[Keith W. <ke...@vm...>]

This branch is hopefully ready for broader testing ahead of a merge.

Can people, especially nv people, pull this down and try it out.  Jakob
has made a best effort to get this right, but neither of us have
hardware.

The branch itself is the start of a significant cleanup of some of the
uglier bits of gallium, particularly the integration with cross-process
shared surfaces, swapbuffers, etc.

Keith