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

Implemented:  FS#2422 - Use domain module when creating subdomains 
Bugfix: datalog was used in the wrong way on editing aliasdomains
Bugfix: missing datalog update for parent domain on editing subdomains

- 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.

Fixed: password match function blocked tabs incorrectly
Fixed: set focus on username input field threw an error if this field did not exist on a page

Fixed: Database creation on APS

Fixed: Some templates used changeTab in a way that was not compatible with the new options to discard changes on changeTab

Links removed from sum rows in stats

Moved old default theme to themes/default-304

Bugfix on db-Class (datalog Update)

Made web_folder field read only on edit

- Fixed missing templates and language entries
- Previous subdomain mode can be used concurrently
- Changed log path to a more convenient location

Added: Form fields are disabled if a client is not allowed to edit a domains main settings

Fixed (partly) FS#2310 - Template switch not working in mailuser module, for dashlets and the login page

added .label + .value class for non-INPUT details in edit forms; changed class for measurement unit to .label -> better output + reduction of unnecessary non-breaking spaces