Merged revisions 2681-2739 from 3.0.4 stable branch.

install/dist/lib/fedora.lib.php

install/dist/lib/gentoo.lib.php

install/lib/installer_base.lib.php

install/sql/incremental/upd_0026.sql

install/sql/ispconfig3.sql

install/tpl/config.inc.php.master

install/tpl/nginx_apps.vhost.master

install/tpl/server.ini.master

interface/lib/classes/custom_datasource.inc.php

interface/lib/classes/listform.inc.php

interface/lib/classes/listform_actions.inc.php

interface/lib/classes/remoting.inc.php

interface/lib/lang/hr.lng

interface/lib/lang/it.lng

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

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

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

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

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

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