nc(1) on FreeBSD
The text 4c11b3957ce1, as FreeBSD 5.5-RELEASE shipped it.
arbitrary TCP and UDP connections and listens
Flags it lists
-
-4 -
-6 -
-D -
-E -
-S -
-U -
-X -
-d -
-e -
-h -
-i -
-k -
-l -
-n -
-o -
-p -
-r -
-s -
-t -
-u -
-v -
-w -
-z