Added support for dovecot in Debian Lenny.

install/dist/conf/centos52.conf.php

install/dist/conf/centos53.conf.php

install/dist/conf/debian40.conf.php

install/dist/conf/fedora9.conf.php

install/dist/conf/gentoo.conf.php

install/dist/conf/opensuse110.conf.php

install/install.php

install/lib/installer_base.lib.php

install/sql/ispconfig3.sql

install/tpl/debian_dovecot-sql.conf.master

install/tpl/debian_dovecot.conf.master

install/tpl/server.ini.master

install/update.php

interface/web/admin/form/server_config.tform.php

interface/web/admin/lib/lang/en_server_config.lng

interface/web/admin/templates/server_config_mail_edit.htm

interface/web/mail/form/mail_user.tform.php

interface/web/mail/mail_user_edit.php

interface/web/mail/mail_user_filter_edit.php

server/conf/sieve_filter.master