zone "dynamic.dehnerts.com" IN {
	// secondary is equivalent, starting in bind-9.15.8
	// https://github.com/isc-projects/bind9/commit/79c2400d91b818e66a45494784cea17f46e807f2
	type secondary;
	file "/var/lib/bind/dynamic.dehnerts.zone";
	masters { "primary-ns"; };
	allow-query { any; };
};