pfctl(8) on OpenBSD
The text 5367b2440af0, as OpenBSD 3.2 shipped it.
control the packet filter (PF) and network address translation (NAT) device
Flags it lists
-
-F -
-N -
-O -
-R -
-d -
-e -
-f -
-h -
-k -
-n -
-q -
-r -
-s -
-v -
-x -
-z