Merge branch 'master' of git.ispconfig.org:ispconfig/ispconfig3

install/dist/lib/debian60.lib.php

install/dist/lib/fedora.lib.php

install/dist/lib/gentoo.lib.php

install/dist/lib/opensuse.lib.php

install/lib/installer_base.lib.php

interface/web/js/mail_domain_dkim.js

interface/web/mail/mail_domain_dkim_create.php

interface/web/mail/mail_domain_edit.php

interface/web/mail/templates/mail_domain_edit.htm

interface/web/tools/resync_do.php

server/plugins-available/mail_plugin_dkim.inc.php