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

- Added dkim installation to installer.
- Added backup filesize in backup cronjob.

http://www.howtoforge.com/forums/showthread.php?t=62691

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

  New global option to grant reseller users access to the options (advanced) tab in web domains and vhost subdomains

Implemented checkboxes in Interface Config to enable showing/hiding the tabs Mail Filters, Autoresponders and Custom Rules for mailboxes.

See also http://www.howtoforge.com/forums/showthread.php?t=59539

 - added configuration options to server config (web tab, php section)
 - do not update custom php.inis if md5sum file does not exist

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

- New feature: you can now add directive snippets for Apache, nginx, and PHP under System > Directive Snippets. These snippets are then available on the Options tab of a web site where they can be easily added to the respective textarea by simply clicking the name of the directive snippet.

- Implemented session message system (template modifications pending)
- Updated ISPC SVN version number to 3.0.5

Note to all contributors: please use utf-8 encoding in files!

Implemented:  FS#2388 - Optional confirm window on changing tabs

Corrected paths in main tpl

- Added overtraffic notifications to traffic quota system (part of FS#2059 - Extend Traffic quota system)