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

c	SPDX-License-Identifier	Short	Long	Help	Protocols	Category	Added	Multi	See-also	Example
Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.	curl	a	append	Append to target file when uploading	FTP SFTP	ftp sftp	4.8	boolean	range continue-at	--upload-file local --append ftp://example.com/

--append

When used in an upload, this option makes curl append to the target file instead of overwriting it. If the remote file does not exist, it is created. Note that this flag is ignored by some SFTP servers (including OpenSSH).