ref(fail2ban): add missing var to user.yml

Add server_ip_address to vars/user.yml
fix(tarsnap): rotate script fails on error

Scripts used to rotate tarsnap backups exit when a command fails
Cron will catch that return code is not zero and will send message to root

No more silent failure
Merge commit 'ead57335be091aa255ac8bb77c03fd6c394dce94'
Replace ferm with ufw
Fix SSL certificate for ZNC so that it begins with a private key.
Merge pull request #70 from hectcastro/hc-znc-ssl-fix

Fix SSL certificate for ZNC so that it begins with a private key
Merge pull request #68 from bcachet/feature/tarsnap

fix(tarsnap): rotate script fails on error
Merge pull request #67 from bcachet/feature/fail2ban

ref(fail2ban): add missing var to user.yml
Merge pull request #69 from ariddell/ufw

Replace ferm with ufw
Merge branch 'master' of https://github.com/al3x/sovereign