@see commit 9a8de140

Fixed: FS#3350 - [Dovecot] Warning: mysql: Query failed, retrying: Unknown column 'filter' in 'where clause'

- Use it like $app->conf('yourpluginname', 'config-key', 'value')
- omit the value to read the config value, provide it to set the value

- Added email message templates.

- Added section toggle for client limits

- Added fields to client, reseller and website to show when a record was added and by which user

http://www.howtoforge.com/forums/showthread.php?t=62691

Reverted SVN trunk back to revision 3938 to remove changes in default theme an a replacement of the ispconfig logo.

- Added backup size to web backups

Changed encoding of incremental sql files to "UTF8 ohne BOM" as some older mysql versions cant load them otherwise with errors like:

ERROR 1064 (42000) at line 1: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'ALTER TABLE `web_domain` ADD `pm` ENUM( 'static', 'dynamic', 'ondemand' ) NOT' at line 1
Loading SQL patch file: /tmp/trunk/install/sql/incremental/upd_0032.sql