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

Added Support for Sieve mail filtering language on dovecot servers.

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

Check if the mysql_connect function exists in the installer.

Added a missing language string in server config form.

Added: interface module web traffic statistics
Fixed: mail_traffic is now reported to master server instead of local
Fixed: GRANTs for slave server database user on master database

- checking for running instance in server.php

sh: /etc/init.d/apache2: No such file or directory

Fixed a bug that prevented the restarting of services when the install is finished.

- Update server.ini during install
- Changed default vmail directory form /home/vmail to /var/vmail

Fixed #250. Services are only restarted if a startscript is defined in the $config variable during installation or update.

Added a notice to the installer to choose 'y' for apache configuration if the server shall run the interface.

Fixed bugs in installer.
A backup file of the database is stored in /root during update.

Changed the installer code to use the global $conf array in all installer functions instead of the $conf member variable of the $inst object to fix bug #187.

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Included jailkit config templates
Added bash.bashrc and motd templates to copy over for for chroot system
Updated ispconfig vhost to include php fastcgi configs if fastcgi is enabled. What if the module is loaded too ?
TODO: jailkit chroot is still not loading the modified motd in /etc/motd and /var/run/motd ??

Added fastcgi support by default into the ISPConfig vhost.
Copies over the fastcgi starter script into /usr/local/ispconfig/interface/bin/

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