un-nest curl

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

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+---
+c: Copyright (C) Dorian Craps, <dorian.craps@student.vinci.be>
+SPDX-License-Identifier: curl
+Long: mptcp
+Added: 8.9.0
+Help: Enable Multipath TCP
+Category: connection
+Multi: boolean
+See-also:
+  - tcp-fastopen
+Example:
+  - --mptcp $URL
+---
+
+# `--mptcp`
+
+Enable the use of Multipath TCP (MPTCP) for connections. MPTCP is an extension
+to the standard TCP that allows multiple TCP streams over different network
+paths between the same source and destination. This can enhance bandwidth and
+improve reliability by using multiple paths simultaneously.
+
+MPTCP is beneficial in networks where multiple paths exist between clients and
+servers, such as mobile networks where a device may switch between WiFi and
+cellular data or in wired networks with multiple Internet Service Providers.
+
+This option is currently only supported on Linux starting from kernel 5.6. Only
+TCP connections are modified, hence this option does not affect HTTP/3 (QUIC)
+or UDP connections.
+
+The server curl connects to must also support MPTCP. If not, the connection
+seamlessly falls back to TCP.