opendkim-genzone(8) on Linux
The text 5f5e324ea6c6, as Debian 10 (Buster), Debian 9 (Stretch) shipped it.
DKIM public key zone file generation tool
Flags it lists
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-C -
-D -
-E -
-F -
-M -
-N -
-R -
-S -
-T -
-d -
-o -
-r -
-s -
-t -
-u -
-v -
-x