- Added [SERVERNAME] placeholder to webmail URL.

- Admins can now choose to be notified by email about debug, warning or error messages in the server process.

  - send quota notifications each X days instead of each day
  - send notification when quota is ok again
  - cleaned up mail sending code

- Merged language files.

- Adde some missing strings to translations in faq module.

Addes some missing translations

- Introduced subsections for forms. With subsections, you can split up large forms. Subsections can be slid into/out of view.

- Improved support for multiple PHP versions. Additional PHP versions have now their own form and database table.

- Fixed FS#1745.