Disabled mysql error messages in interface. If a developer needs it, he can enable it in the mysql db lib for debugging.

- Ensure that all mailman config files exist that were used in postfix main.cf, even if mailman is not installed to avoid postfix errors.
- Fixed some php notices in installer.

- Fixed FS#2733 - The Linux shell users of a website does not get removed when the website is removed.

Fixed a sql error in vm list.

- Fixed bug with $mysqli->connect_error in PHP versions prior to 5.2.9 and 5.3.0 in server mysql library.

- Added: remoting queries with a lot of results (e.g. email addresses or alias domains or dns rr) lead to non-functioning soap requests
  - added '#OFFSET#' AND '#LIMIT#' handling to the query
  - added automatic 'WHERE 1' if an empty array was given as query
  example: $result = $api->sites_web_domain_get('type' => 'vhost', '#OFFSET#' => 25, '#LIMIT#' => 50); to get the websites 26 to 75

- Make sure the correct php.ini master file 8dependent on PHP version) is loaded when custom PHP options are set (Apache + FastCGI).

- Fixed: maildeliver plugin wrote email multiple times when having alias domains. this could grow the sieve script above 1mb -> sieve script did no longer work

FS#2700 - Delete Addon Package: Invalid ID

- Added function to find out when a MySQL user can be dropped and when we have to revoke user rights on databases instead of dropping the user.

- MySQL: Skip processing if database was and is inactive.
- MySQL: Stop processing after database is set to inactive.