Firewall update

[dkindlund]

I still think we need to make a minimal linux firewall VM which doesn't rely on honeywall. All it really needs it iptables, ssh, svn, and perl.

Also, use of IPTables::IPv4 should be deprecated, as it does not appear to be maintained. Code should be switched to IPTables::libiptc (this was apparently already documented here
https://www.honeyclient.org/trac/wiki/Workaround/IPTablesIPv4
)

I will try to find the code which uses libiptc and post it to this ticket.