nfsuserd(8) on FreeBSD
The text cca2fced345d, as FreeBSD 12.2-RELEASE shipped it.
load user and group information into the kernel for NFSv4 services plus support manage-gids for all NFS versions
Flags it lists
-
-domain -
-force -
-manage-gids -
-usermax -
-usertimeout -
-verbose