Merge branch 'reject_sender_login_mismatch' into mdbox-format

helper_scripts/recreate_webalizer_stats.php

install/apps/metronome_libs/mod_auth_external/db_auth.php

install/apps/metronome_libs/mod_auth_external/db_isuser.php

install/dist/lib/debian60.lib.php

install/dist/lib/fedora.lib.php

install/dist/lib/gentoo.lib.php

install/dist/lib/opensuse.lib.php

install/install.php

install/lib/installer_base.lib.php

install/lib/mysql.lib.php

install/lib/update.lib.php

install/sql/incremental/upd_dev_collection.sql

install/sql/ispconfig3.sql

install/tpl/debian6_dovecot2.conf.master

install/tpl/debian_dovecot2.conf.master

install/tpl/mysql-virtual_outgoing_bcc.cf.master

install/tpl/server.ini.master

install/tpl/system.ini.master

install/uninstall.php

install/update.php