- Added "Rewrite Rules" field to the "Redirect" tab so that customers can set rewrite rules themselves on nginx.

  Along with this fixed some display problems with the combo boxes introduced in 3.0.5.
  Some fields were not correctly displayed with the predefined values if value and text of the underlying option element differ.

- Display/email reason for service restart/reload failure (if init script doesn't suppress error messages).

  It is now possible to put a customized copy of each .master template file into
  /usr/local/ispconfig/server/conf-custom/install/
  to keep manual changes done in this file.
  If existing, these .master files are used on ISPConfig upgrade instead of the provided installer templates.

- Fixed: web folder protection needs to be removed on ftp-user insert and update due to directory creation

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

- Improved recognition of when a service (Apache, nginx, etc.) was really restarted/reloaded successfully. Checking port 80 is not enough because nginx reloads silently, ignoring faulty configuration files, but returns a value > 0. If we don't check the return value, nginx will refuse to start when someone issues a restart the next time.

 - added lost password button to login form
 - added back button to lost password form

- cron_daily.php: "quota ok" messages are now also sent if quota is set to unlimited; before, when a quota warning was sent and the quota was then set to unlimited, no "quota ok" message was sent because of SQL query that looked for records where quota > 0.

- Implemented: Virtual columns (columns that are not in the db but shown in the list) can now be sorted if defined correctly

- fixed permission of vars starting with _

  ->setLoop('abc', $content);
  will automatically add a
  ->setVar('_abc', count($content))
  IMPORTANT: template variables and loop names starting with _ are not allowed anymore, those are reserved for the counters!

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

- added german translation