nsd(8) on OpenBSD
The text f19aa45f8c39, as OpenBSD 5.4, OpenBSD 5.3 shipped it.
Name Server Daemon (NSD) version 3.2.15.
Flags it lists
-
-4 -
-6 -
-I -
-N -
-P -
-V -
-a -
-c -
-d -
-f -
-h -
-i -
-l -
-n -
-p -
-s -
-t -
-u -
-v