to be fully automated in zones configured for
			dynamic DNS.  'auto-dnssec allow;' permits a zone
			to be signed by creating keys for it in the
			key-directory and using 'rndc sign <zone>'.
			'auto-dnssec maintain;' allows that too, plus it
			also keeps the zone's DNSSEC keys up to date
			according to their timing metadata. [RT #19943]