New nvidia driver obstacle

[justin at shiningsilence.com]

> The Xorg/XFree86 graphics driver part depends heavily on a FreeBSD5
> userland
> (KSE, TLS and (presumably) _their_ libc5) and hence will not load. No
> crashes
> and other nasty stuff, but unresolved symbols are plagueing me. No love :(
>
> I will keep you guys posted about any progress.

This may be obvious, but if this turns out to be unworkable, we need to
keep the older version around and available.