un-nest curl

curl-8.15.0/docs/cmdline-opts/tcp-fastopen.md

@@ -0,0 +1,19 @@
+---
+c: Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
+SPDX-License-Identifier: curl
+Long: tcp-fastopen
+Added: 7.49.0
+Help: Use TCP Fast Open
+Category: connection
+Multi: boolean
+See-also:
+  - false-start
+Example:
+  - --tcp-fastopen $URL
+---
+
+# `--tcp-fastopen`
+
+Enable use of TCP Fast Open (RFC 7413). TCP Fast Open is a TCP extension that
+allows data to be sent earlier over the connection (before the final
+handshake ACK) if the client and server have been connected previously.