Merge branch 'develop' of git.ispconfig.org:ispconfig/ispconfig3 into develop

install/lib/installer_base.lib.php

install/tpl/debian6_dovecot2.conf.master

install/tpl/debian_dovecot2.conf.master

install/tpl/dovecot_custom.conf.master

install/tpl/fedora_dovecot2.conf.master

install/tpl/nginx_apps.vhost.master

install/tpl/nginx_ispconfig.vhost.master

install/tpl/postfix_custom.conf.master

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

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

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

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

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

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

server/conf/nginx_apps.vhost.master

server/plugins-available/apps_vhost_plugin.inc.php