last things and fixes for some of the iSec reported issues

Inlcudes some of the fixes for issues reproted by iSec and the fix for unattended-upgrades that I was working on when iSec started the sec audit. Closes #439, #437, #435, #441 

Also adds
- the facistfirewall setting to torrc file so that the ports could also be restricted in the iptables rules. 
- Example network firewall rules
- xSendFile so that large files can be downloaded
I see your .procmailrc setup with send_encrypted_alarm.sh. I notice you
are piping with gpg, but I think perhaps you should set it up the
Content-Type to use PGP/MIME too. Would this
<http://www.j3e.de/pgp-mime-encrypt-in-procmail.html> be a more ideal
config, or even to use this <https://code.google.com/p/gpg-mailgate/>?