Removed backup_dir_mount_cmd option from Sysstem > server config. The option has been replaced by a script /usr/local/ispconfig/server/scripts/backup_dir_mount.sh. If this script exists, is exacutable and is owned by the root user, then it will be executed upfront of the backup jobs when the option "Backup directory is a mount?" is enabled in server config settings.

- Fixed: nginx placeholders could not be added to directive snippets textarea by clicking on the link.

Fixed regex in prefix validation under System > interface config that prevented numbers in prefixes.

- Added missing option in centos dovecot.conf file

- Updated version number to 3.0.5.4rc1

- Updated Linux Distribution detection to recognize all wheezy sub versions correctly.

This reverts commit 4cd62d78.

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

- Added options to use a mounted backup directory. This allows for remote backups, e.g. vis sshfs to a backup server. The backup script checks if the backup directory is mounted, and if not, tries to mount it.

Fixed login as

- nginx: added {DOCROOT} and {FASTCGIPASS} placeholders to directive snippets and nginx Directives fields.