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

c	SPDX-License-Identifier	Long	Arg	Help	Category	Added	Multi	Scope	See-also	Example
Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.	curl	stderr	<file>	Where to redirect stderr	verbose	6.2	single	global	verbose silent	--stderr output.txt $URL

--stderr

Redirect all writes to stderr to the specified file instead. If the filename is a plain '-', it is instead written to stdout.