un-nest curl

curl-8.15.0/docs/cmdline-opts/append.md

@@ -0,0 +1,23 @@
+---
+c: Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
+SPDX-License-Identifier: curl
+Short: a
+Long: append
+Help: Append to target file when uploading
+Protocols: FTP SFTP
+Category: ftp sftp
+Added: 4.8
+Multi: boolean
+See-also:
+  - range
+  - continue-at
+Example:
+  - --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).