Finish moving non-secrets from secret directory

This moves the last of the config files out of secret. Most files in
secret are now plain text files with just a username or password. This
means that make secrets is now nearly complete. The files that make
secrets cannot create are listed after running it.
Add domain names in pf.conf to hosts

This way the gateways can come up with the correct firewall rules even
without any network connectivity. This was a problem during power
outages when the gateways would try and load the firewall before UTD's
nameservers came up. This would fail requiring a manual reboot later.

Hard coding the IPs should not be an issue as monit checks every minute
that the A records do not differ from what has be hard coded in hosts.