Revert "glx/dri3: Request non-vsynced Present for swapinterval zero. (v3)"

This reverts commit ee241a688904211663e9445ed90e6d51aca3204f.

May not be the correct fix. Discussion is ongoing.

http://lists.freedesktop.org/archives/mesa-dev/2014-December/072969.html
Update version to 10.4.1

Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
Add release notes for the 10.4.1 release

Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
docs: Add sha256 sums for the 10.4.1 release

Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>