Add a server flag (AllowEmptyInput), which will inhibit adding the
standard keyboard and mouse drivers, if there are no input devices in the
config file.
Remove most of the rest of the old keyboard driver.
Move to the new Get{Keyboard,Pointer}Events API, which is mostly
complete at this stage: just missing the proximity events.
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>.
