xconfig plugin update for Xorg 7

Hi,

First of all, Happy new year 2008!

Since the import of xorg 7 in FreeBSD ports tree xconfig plugin does
not work because getconfig is gone.
After some research, I found a way to discover the right driver for
VGA card with Xorg -probeonly.

This is just a proof of concept, the patch is available at
http://djdomics.free.fr/FreeBSD/freesbie2/patches/xconfig.sh.diff

Comments are very welcome!

Regards
-- 
There's this old saying: "Give a man a fish, feed him for a day. Teach
a man to fish, feed him for life."
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