Wie ĂĽblich ist alles "gut gemeint":
https://blog.powerdns.com/2016/01/27/per-device-dns-settings-selective-parental-control/
https://lists.dns-oarc.net/pipermail/dns-operations/2016-January/014141.html
https://lists.dns-oarc.net/pipermail/dns-operations/2016-January/014151.html
http://www.faqs.org/rfcs/rfc7871.html
