[X11DRV] Re-add support for the 'UseXShm' config key.

[Lionel Ulmer]

> But is it useful enough to justify exposing it, documenting it,
> explaining to users they shouldn't touch it, etc.?  IOW do you use it
> often enough that it's painful for you to have to modify the source
> and rebuild to disable it?

No, it's as easy for me to just add 'return NULL;' in the file and do a
'make install' in the x11drv directory.

I will check the sample config file to see if it needs to be patched to
remove this option there.

               Lionel

-- 
		 Lionel Ulmer - http://www.bbrox.org/