Clean up some cruft

Oops, shouldn't have committed that.
Cleanup mtree

So many accidental vi tmp files
Cleanup after dhclient

If we have /var/db/dhclient.leases sitting around and want to use
nsh later then it "forces" nsh to use dhcp on that interface which
is not what we want.
A somewhat working example of nsh for amd64

The compiled binaries are compiled for amd64, not that I wanted to,
but I haven't come up with a good way to deploy specific binaries
for different architectures/versions.

The rc.firsttime script works fairly well, needs to disable the
roles that it is taking over for, but haven't come up with a good
solution for that.