[Xorg] Introduce DRI_VERSION?

[Alan Coopersmith]

Jens Owen wrote:
> Perhaps it's time to bump the XORG_VERSION_CURRENT string to 
> differentiate between the last release of X.org and the next.  Would 
> that help you?

The big dri merge seems a good time to label snapshot 6.7.0.90 or
however we want to start identifying the pre-6.7.1 snapshots.  (How
do we want to do that?)

-- 
	-Alan Coopersmith-           alan.coopersmith at sun.com
	 Sun Microsystems, Inc. - X Window System Engineering