nsd(8) on OpenBSD
The text 2459e222bf0c, as OpenBSD 6.3, OpenBSD 6.2, OpenBSD 6.1, OpenBSD 6.0 shipped it.
Name Server Daemon (NSD) version 4.1.10.
Flags it lists
-
-4 -
-6 -
-I -
-N -
-P -
-V -
-a -
-c -
-d -
-f -
-h -
-i -
-l -
-n -
-p -
-s -
-t -
-u -
-v