Move SendEventToAllWindows and FindInterestedChildren from chgptr to exevents,
so the DIX can more easily use it.
Clean up two warnings (type mismatch, unused variable) in exevents.c.
Add XSERV_t, TRANS_SERVER, TRANS_REOPEN to quash warnings.
Add #include <dix-config.h> or <xorg-config.h>, as appropriate, to all
source files in the xserver/xorg tree, predicated on defines of
HAVE_{DIX,XORG}_CONFIG_H. Change all Xfont includes to
<X11/fonts/foo.h>.