nemesis-igmp(1) on Linux
The text cf636887647d, as Debian 4.0 (Etch), Debian 3.1 (Sarge) shipped it.
IGMP Protocol (The Nemesis Project)
Flags it lists
-
-D -
-H -
-I -
-M -
-O -
-P -
-S -
-T -
-Z -
-d -
-i -
-p -
-t -
-v