Merge remote-tracking branch 'ispc3master/master' into vhostalias

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/lib/install.lib.php

install/lib/installer_base.lib.php

install/sql/incremental/upd_0049.sql

install/sql/incremental/upd_0052.sql

install/sql/incremental/upd_0055.sql

install/sql/incremental/upd_0063.sql

install/sql/incremental/upd_0064.sql

install/sql/incremental/upd_0065.sql

install/sql/ispconfig3.sql

interface/lib/classes/client_templates.inc.php

interface/lib/classes/custom_datasource.inc.php

interface/lib/classes/ispcmail.inc.php

interface/lib/classes/remote.d/admin.inc.php

interface/lib/classes/remote.d/mail.inc.php

interface/lib/classes/remoting.inc.php

interface/lib/classes/tform_base.inc.php