langs: Fix typo
Firewall: fixed colors of target column when using standard networks

When using RED, OpenVPN-Dyn or IPsec RW as target, the column was not
colored.
Firewall: Bugfix: the routine to check if a vpn net or host was deleted did not work as expected. Now it even works when source and target contain a vpn host or net
Firewall: New feature: Now it is possible to define a custom service with a portrange. When using this service in a rule or in a servciegroup, the rule is applied correctly.
Firewall: The maximum of definable services in a servicegroup is limited to 13 per protocol (tcp,udp) because iptables can only handle max 13 services in Multiport
Firewall: appended check of maximum ports per protocol. portranges 100:200 count as 2 ports
Firewall: new errormessage for maximum number of ports in servicegroups