nfsd(8) on macOS
The text 411a19e52da5, as macOS 11.2, macOS 11.1, macOS 11.0.1 shipped it.
NFS server daemon
Flags it lists
-
-F -
-N -
-P -
-R -
-n -
-p -
-r -
-t -
-u -
-v