Pull up following revision(s) (requested by riastradh in ticket #1116):
	external/mit/libdrm/dist/xf86atomic.h: revision 1.4
Fix libdrm's atomic_dec_and_test on NetBSD (and Solaris, while here).
_nv means new value, not old value!  This may help to fix various
instability in userland graphics, now that we aren't freeing stuff
with a reference count of 1 any more.
Pull up following revision(s) (requested by snj in ticket #1181):
	xsrc/external/mit/libXt/dist/src/ResConfig.c	patch

Fix DEBUG build of libXt.  From Sandro Millien in PR xsrc/48863.
Pull up following revision(s) (requested by tsutsui in ticket #1183):
	external/mit/xf86-video-wsfb/dist/src/wsfb_driver.c: revision 1.22
	external/mit/xf86-video-wsfb/dist/src/wsfb_driver.c: revision 1.23
	external/mit/xf86-video-wsfb/dist/src/wsfb_driver.c: revision 1.25
Fix wrong VRAM size calculation on old drivers without GET_FBINFO ioctl.
The linebytes is a byte number of width so it should be
(linebytes * height), not (width * linebytes).
XXX: I'm not sure where WSDISPLAYIO_GET_FBINFO implementation was discussed
     but I wonder if we should use proper ifdef or macro to share this
     third party Xorg driver with OpenBSD...
No need to handle colormap ioctls if cmsize == 0 even in WSFB_CI case.
Add kludge to use luna68k 4/8bpp framebuffers as a monochrome server.
The idea is taken from mlterm-fb --depth option implementation.
This change should not affect other framebuffer types.
Tested on 4bpp on LUNA and 1bpp/8bpp on LUNA-II.