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

- 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.

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

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

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)

Bugfix: Show error message on smtp enabled without administrator mail / name

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

Addes some missing translations

This option can be enabled under System > Server config and is named "Web folder protection".