sftp-server(8) on Linux
The text 163daf64267f, as Debian 13 (Trixie), Debian 12 (Bookworm) shipped it.
OpenSSH SFTP server subsystem
Flags it lists
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-P -
-Q -
-R -
-d -
-e -
-f -
-h -
-l -
-p -
-u