Merge branch 'patch-misc' into 'stable-3.1'

install/dist/tpl/gentoo/amavisd-ispconfig.conf.master

install/tpl/amavisd_user_config.master

install/tpl/mysql-virtual_policy_greylist.cf.master

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

interface/lib/classes/validate_autoresponder.inc.php

interface/lib/plugins/mail_user_filter_plugin.inc.php

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

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

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

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

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

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

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

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

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

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

interface/web/dns/form/dns_a.tform.php

interface/web/dns/form/dns_aaaa.tform.php

interface/web/dns/form/dns_alias.tform.php

interface/web/dns/form/dns_cname.tform.php