Merged revisions 1832-1836 from stable (added dovecot support for debian squeeze and added a new distid and class for debian6 specific modifications.

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

- Improved debian installer.

- Added Installation instructions for Fedora 12
- Added Dovecot support for fedora 12

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

Added a "under_development" folder in the docs folder. This folder can be used to store incomplete documentation or documentation files that are under devlopment.

- Update installation on Squeeze