iw7-mod/deps/curl/docs/cmdline-opts/http0.9.md

c	SPDX-License-Identifier	Long	Tags	Protocols	Help	Category	Added	Multi	See-also	Example
Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.	curl	http0.9	Versions	HTTP	Allow HTTP 0.9 responses	http	7.64.0	boolean	http1.1 http2 http3	--http0.9 $URL

--http0.9

Tells curl to be fine with HTTP version 0.9 response.

HTTP/0.9 is a response without headers and therefore you can also connect with this to non-HTTP servers and still get a response since curl simply transparently downgrades - if allowed.

HTTP/0.9 is disabled by default (added in 7.66.0)