unbound-host(1) on OpenBSD
The text a6ea840e1e9d, as OpenBSD 6.8 shipped it.
unbound DNS lookup utility
Flags it lists
-
-4 -
-6 -
-C -
-D -
-F -
-c -
-d -
-f -
-h -
-r -
-t -
-v -
-y