example configurations of NetBSD and Xen

[Erik Fair <fair%netbsd.org@localhost>]

So, I've read our documentation, such as it is, and tried resources elsewhere, 
but I think it would be helpful if there were example working configuration 
files for NetBSD as dom0, and NetBSD as domU, particularly (for me) with 
complex xennet arrangements.

        any love?

        Erik <fair%netbsd.org@localhost>