[PATCH 0/7] Updated enter/leave event model

[peter.hutterer at who-t.net]

This patch series updates the X server to the enter/leave event model proposed
by Owen Taylor a few months back [1]. Instead of the current model where some
Enter or Leave events are only suppressed, this model actually adjusts each
model to be true for a local scope.

This only applies to core events, device events are still being sent
unconditionally.

Note that this patch was one big patch split up into multiple ones to ease
review. While each patch compiles, I haven't tested them separately.
Also, more testing is needed (especially the grab cases) before it can go
upstream but I'd appreciate any early review.

[1] http://lists.freedesktop.org/archives/xorg/2008-August/037606.html