ldns-gen-zone(1) on Linux
The text 2a5361f3a886, as Debian 12 (Bookworm), Debian 11 (Bullseye), Debian 10 (Buster), Debian 9 (Stretch) shipped it.
read a zonefile and print it while adding DS records and extra RR's
Flags it lists
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-a -
-h -
-o -
-p -
-s -
-v