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

- Added function to detect the apache version to installer.
- Added support for apache 2.4 to vhots templates for ispconfig vhost and apps vhost in installer.

- Add missing configuration inclusion (vhost files) to apache config

The "old" monitoring-module and the "new" rescue-module needed some function twice. So i created a tool-object containing these functions

- replace double-quotes with single-quotes whenever appropriate
- fix indentation

- The updater still asks for the port number, but with this update the default number that is shown is read from the vhost file as xaver suggested.

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

Implemented: FS#973 - Gentoo support for installer. Fixed FS#974 - Directory mode for firewall configuration