master-server/deps/curl/docs/cmdline-opts/tlsv1.md

c	SPDX-License-Identifier	Short	Long	Tags	Protocols	Added	Mutexed	Requires	Help	Category	Multi	See-also	Example
Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.	curl	1	tlsv1	Versions	TLS	7.9.2	tlsv1.1 tlsv1.2 tlsv1.3	TLS	TLSv1.0 or greater	tls	mutex	http1.1 http2	--tlsv1 $URL

--tlsv1

Use at least TLS version 1.x when negotiating with a remote TLS server. That means TLS version 1.0 or higher