It is more explicit and elegant but more of a pain to manage especially
with the new function. It was structured that way for other hosts'
secrets but it isn't really used in practice. We could just enforce a
convention such as a `hosts` prefix to contain those secrets.
CoreDNS doesn't have dynamic updates available yet (though there are PRs
and discussions for it) so we'll have to go with something that has it.
Also, it provides an opportunity for me to use the de-facto software for
this.
