unbound-anchor(8) on OpenBSD
The text 4b5bc0e5a7eb, as OpenBSD 5.9 shipped it.
Unbound anchor utility.
Flags it lists
-
-4 -
-6 -
-C -
-F -
-P -
-a -
-c -
-f -
-h -
-l -
-n -
-r -
-s -
-u -
-v -
-x