dnssec-dsfromkey(8) on macOS
The text 21d672f5bd09, as Mac OS X 10.8.1, Mac OS X 10.8 shipped it.
DNSSEC DS RR generation tool
Flags it lists
-
-1 -
-2 -
-A -
-K -
-a -
-c -
-f -
-l -
-s -
-v