[PATCH] Removal of early acceptance and grab_window

[Peter Hutterer]

These two features were still marked with a "FIXME" in the server, both
unimplemented (early acceptance responded with a BadAccess, the window
argument was ignored completely).
Drop them from XI 2.2, they're a nice feature to have but it's unlikely that
they will get implemented in time and so far the MT implementations do not
seem to require either feature. Dropping grab_window from libXi's
XIAllowEvents is a bit of a pain for clients, but since the argument was
ignored anyway, clients can just remove it and recompile - no logic changes
required.

Cheers,
  Peter