Show warning message someone tries to use root as username for a client database when the database prefixes are removed.

- Added alternative code for a is_group function which might perform better then the old implementation. It has to be tested yet and is commented out.

Impoved the software update function to enable the installation of apps like phpmyadmin into the apps vhost.

- Fixed a problem with the automatic creation of maildir subfolders.

- added installation instructions for opensuse 11.2 with bind and dovecot
- fixed a bug in bind plugin.
- improved opensuse installer.

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Fixed general utf8 encoding problems when data is passed from frontend to server, this fixes also bug FS#1065 - Special characters in autoresponder subject may break the autoresponder 

Fixed: FS#1047 - php scripts with suexec do not work togetherv with redirects (proposed solution included)