Modify the firewall /etc/hosts setup to include unqualified control net IP
addresses so that NS firewall rules can include the symbolic node names.

Modified the tmcc firewallinfo command to return the host info and rc.firewall
to do the setup.  Maybe should have done this by changing how the tmcc hosts
command works for firewalls, but rc.hostnames gets run after rc.firewall and
I didn't want to figure out if there were any dependencies.