InitValuatorDeviceClass.
Add InitProximityClassDeviceStruct call to prepare for tablet support.
(cherry picked from commit 1bd980a5b114f5320360943214f8f9f23b29c1e3)
Also fixed DarwinEQEnqueue to match changes to the callback
And also use dpmsstubs.c rather than copying the code into darwin.c
(cherry picked from commit 4c5c30a4beb7a427b00b18097f548876ad3c11d7)
8 bit color still doesn't work, but the -depth command line argument now works properly.
(cherry picked from commit 6765949c27c053d22882f54337cfd09203aa5383)
General code cleanup, whitespace, dead code removal, added missing prototypes.
Made Xquartz come to foreground later in startup, so it doesn't appear for Xquartz -version
(cherry picked from commit 36922e8ff4316c93843aa3fe959cf8df3c7d5892)
Leaving xpr unflattened since we want modularity to replace that with xpc (XPluginComposite) at some point
(cherry picked from commit 48e6a75fbdd0fee86e364f02ace83f20b312a2b2)