Domains are allowed to start with numbers and are currently not resolved
because of the current simple regex.
The new regexes better cover the IPv4 and IPv6 address (with optional
netmask)
The "limit" and "deny" parameters have been added to both the services and
applications sections. Setting "limit: True" will use the "ufw limit" command
instead of "ufw allow". Likewise, setting "deny: True" will use the "ufw deny"
command.