sftp(1) on macOS
The text ec0f35beb042, as Mac OS X 10.4.8.x86, Mac OS X 10.4.8.ppc shipped it.
secure file transfer program
Flags it lists
-
-1 -
-B -
-C -
-F -
-P -
-R -
-S -
-b -
-o -
-v