adduser(8) on FreeBSD
The text c5eccd1c6d39, as FreeBSD 12.2-RELEASE shipped it.
command for adding new users
Flags it lists
-
-C -
-D -
-E -
-G -
-L -
-M -
-N -
-S -
-d -
-f -
-g -
-h -
-k -
-m -
-q -
-s -
-u -
-w