rtsold(8) on FreeBSD
The text 1168946aa4f7, as FreeBSD 13.2-RELEASE, FreeBSD 13.1-RELEASE shipped it.
router solicitation daemon
Flags it lists
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-1 -
-D -
-F -
-M -
-O -
-R -
-a -
-d -
-f -
-i -
-m -
-p -
-u