[arch-dev-public] X.Org 7.4 moves to extra

X.Org 7.4 has been moved to extra. After sitting in testing for quite some months, it's time to move this package. This version fixes quite some issues present in the old version we had in extra. This version contains some important changes: - Input hotplugging is enabled by default now. See http://wiki.archlinux.org/index.php/Xorg_input_hotplugging for more information. - nvidia-71xx is no longer supported and has been removed from the repositories. Affected users should install xf86-video-nv or xf86-video-vesa, complaints can be sent to nvidia for not providing compatible drivers.