- 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

- Made remote IPs field for databases longer.

- Lists can now be created from more than one database table (including sorting and searching) // needs more testing!

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