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

install/dist/lib/fedora.lib.php

install/dist/lib/gentoo.lib.php

install/dist/lib/opensuse.lib.php

install/lib/installer_base.lib.php

install/sql/incremental/upd_dev_collection.sql

install/sql/ispconfig3.sql

install/tpl/debian_postfix.conf.master

install/tpl/fedora_postfix.conf.master

install/tpl/gentoo_postfix.conf.master

install/tpl/mysql-virtual_sender-relayauth.cf.master

install/tpl/mysql-virtual_sender-relayhost.cf.master

install/tpl/opensuse_postfix.conf.master

interface/web/client/form/client.tform.php

interface/web/client/form/client_template.tform.php

interface/web/client/form/reseller.tform.php

interface/web/client/lib/lang/ar_client.lng

interface/web/client/lib/lang/ar_client_template.lng

interface/web/client/lib/lang/ar_reseller.lng

interface/web/client/lib/lang/bg_client.lng

interface/web/client/lib/lang/bg_client_template.lng