Missing div ending and clean up footer tabbing

+ Added DNS-import, not finished. Needs language-variables and better way to parse SOA-record and possibly some cleaning.

- Added UFW firewall support.

changed translation of sites from "domains" to "Internet-Auftritt", because we also have a MODULE called "domains"

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First Version of the Server-Config of the new rescue module (module is not implemented yet, only the Config-interface)

Added global functions library which conatins a mail functin that supports attachments and a array_merge function that merges arrays that conatain numeric keys and strings correctly.