mrouted(8) on OpenBSD
The text fb79977ac15d, as OpenBSD 6.6, OpenBSD 6.5, OpenBSD 6.4, OpenBSD 6.3, OpenBSD 6.2, OpenBSD 6.1, OpenBSD 6.0, OpenBSD 5.9 shipped it.
IP multicast routing daemon
Flags it lists
-
-c -
-d -
-p