master-server/deps/curl/docs/cmdline-opts/ftp-ssl-control.md

c	SPDX-License-Identifier	Long	Help	Protocols	Added	Category	Multi	See-also	Example
Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.	curl	ftp-ssl-control	Require TLS for login, clear for transfer	FTP	7.16.0	ftp tls	boolean	ssl	--ftp-ssl-control ftp://example.com

--ftp-ssl-control

Require SSL/TLS for the FTP login, clear for transfer. Allows secure authentication, but non-encrypted data transfers for efficiency. Fails the transfer if the server does not support SSL/TLS.