pfctl(8) on OpenBSD
The text 082f533e5423, as OpenBSD 3.1 shipped it.
control the packet filter device
Flags it lists
-
-F -
-N -
-O -
-R -
-d -
-e -
-h -
-k -
-l -
-m -
-n -
-q -
-r -
-s -
-t -
-v -
-x -
-z