That way the default values will not be applied by mistake. The user
needs to uncomment the lines from `vars/users.yml` and set them.

Also renamed openvpn variables.

Refs #39

Refs #39

(such as root's cron errors)

Fix CAcert usage in postfix and dovecot

Fix Postfix configuration file to link to correct SSL certificate locations

Removed your hardcoded server IP

The old action would generate a crontab job for `* 3 * * *`, which means every minute at 3am, so 60 times per day.

Thanks @pjan