[PC-BSD Testing] Fix for some nvidia systems

[Kris Moore]

Bill and others may experience issues with using the nvidia driver on 
BETA1, related to libwfb being incorrectly replaced with nvidia's 
version. Here is the fix:

Install PC-BSD 7.1-BETA1
Skip the video setup, or use vesa mode, (Do not use the nvidia driver, 
it will remove some files incorrectly)
Once up at the desktop, download this file

http://www.pcbsd.org/~kris/nv-fix.tgz

Run these commands:
# rm /PCBSD/packages/*
# cd /
# tar xvzf nv-fix.tgz

Then reboot, and choose option 7 to re-run the x-setup tool. You should 
have new nvidia drivers available, such as 180.37, and they won't delete 
libwfb incorrectly anymore.

Bill, can you confirm this gets your card working again? I didn't catch 
it before, because not all setups use the libwfb driver it seems, and 
just ignored if it was bad.

Thanks!