dnssec-dsfromkey(8) on macOS
The text ef6179dc643b, as macOS 10.13.3, macOS 10.13.2, macOS 10.13.1, macOS 10.13 shipped it.
DNSSEC DS RR generation tool
Flags it lists
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-1 -
-2 -
-A -
-K -
-T -
-V -
-a -
-c -
-f -
-h -
-l -
-s -
-v