Log Message:
Update to 2.0.4, closes PR pkg/23820.

Changes:

	o build fix: cygwin has no sys/shm.h and sys/ipc.h, so configure
	  disables all targets requiring them, if not present.
	o cbconsist demo: sync with devel tree
	o gcc 3.3 compiling fix for default/linear_16/crossbuild.c
	  (fixes Debian bug #197214)
	o merged build fix from FreeBSD's ports tree to make the xf86dga
	  target compile on FreeBSD (fixes FreeBSD PR ports/52380)

	o X-target
        	+ minor mode initialization fix from Argo Vessmann
        	+ shm helper checks return code, when setting up the
		  directbuffer
        	+ release locking on failure. (Threadsafety fix)
        	+ fixed geometry check. Opening (very) small windows is now
		  possible.