sftp(1) on OpenBSD
The text f48f182b66ed, as OpenBSD 4.1, OpenBSD 4.0, OpenBSD 3.9 shipped it.
secure file transfer program
Flags it lists
-
-1 -
-B -
-C -
-F -
-P -
-R -
-S -
-b -
-o -
-v