Changed cron_daily.php to avoid some php notices.

skip writing dkim-values for inactive domains
removed the public-dkim-key from the interface
added german language-file

Reverted SVN trunk back to revision 3938 to remove changes in default theme an a replacement of the ispconfig logo.

- Added backup size to web backups

- need to have the pecl idn and intl modules installed
  or
- have the idna_convert class in the classes/idn/ path

Fixed/Implemented: replaced intval() by $app->functions->intval() in all interface functions due to big number problem in intval()

- Implemented: FS#1935 - Add minimum allowed seconds Value for DNS zone records

Changed the UI for the DNS SRV records to help the user (instead of giving him 1 field which have to have 3 texts, now there are 3 fields which will be concated for the database and splitted for the user).

data --> weight port target

disable this while I work to clean up the validators, some forms have regex for existing validators. I should add some notes to the Coding Guidelines about this.