sftp-server(8) on OpenBSD
The text 5ab1a999dfff, as OpenBSD 5.2, OpenBSD 5.1, OpenBSD 5.0, OpenBSD 4.9, OpenBSD 4.8, OpenBSD 4.7 shipped it.
SFTP server subsystem
Flags it lists
-
-R -
-e -
-f -
-h -
-l -
-u