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

install/lib/installer_base.lib.php

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

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

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

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

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

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

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

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

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

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

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

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

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

interface/web/admin/templates/system_config_misc_edit.htm

interface/web/client/templates/client_message.htm

interface/web/dashboard/lib/lang/de_dashlet_mailquota.lng

interface/web/dns/dns_a_edit.php

interface/web/dns/dns_aaaa_edit.php

interface/web/dns/dns_alias_edit.php