route6d(8) on FreeBSD
The text 188b74e9fa51, as FreeBSD 11.0-RELEASE shipped it.
RIP6 Routing Daemon
Flags it lists
-
-A -
-D -
-L -
-N -
-O -
-P -
-Q -
-R -
-S -
-T -
-a -
-d -
-h -
-l -
-n -
-p -
-q -
-s -
-t