Revision 500666

x11-wm/compiz: Clean up port's makefile

- Add modesetting to the drivers whitelist
- Use upstream name xfwm4 instead of xfwm to properly fall back
- Remove reference to former option GNOME
- Simplify option DBUS
- Add missing dependencies
- Add LICENSE
- Add USES=gnome, USES=gl and USE_GL=gl
- Reorder the variables to pet portlint
- Regenerate patch files to pet portlint

Metacity migrated to GTK+ 3 while Compiz still uses GTK+ 2. This
incompatibility was left unseen at make time because of a reference to
former option GNOME in an assertion which resulted in METACITY being always
disabled.

Committer's changes:
- Remove broken option METACITY
- Further lint the makefile

PR:		230894
Submitted by:	Samy Mahmoudi <samy.mahmoudi@gmail.com>
Reviewed by:	mat
Approved by:	portmgr (maintainer timeout: > 14 days)
Differential Revision:	https://reviews.freebsd.org/D19467