curl-w32/docs/cmdline-opts/form-escape.md

c	SPDX-License-Identifier	Long	Help	Protocols	Added	Category	Multi	See-also	Example
Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.	curl	form-escape	Escape multipart form field/file names using backslash	HTTP	7.81.0	http upload	single	form	--form-escape -F 'field\name=curl' -F 'file=@load"this' $URL

--form-escape

Tells curl to pass on names of multipart form fields and files using backslash-escaping instead of percent-encoding.