Merge branch 'mptcp-misc-fixes-for-v7-0-rc2'

Matthieu Baerts says:

====================
mptcp: misc fixes for v7.0-rc2

Here are various unrelated fixes:

- Patch 1: avoid bufferbloat in simult_flows selftest which can cause
  instabilities. A fix for v5.10.

- Patches 2-3: reduce RM_ADDR lost by not sending it over the same
  subflow as the one being removed, if possible. A fix for v5.13.

- Patches 4-5: avoid a WARN when using signal + subflow endpoints with a
  subflow limit of 0, and removing such endpoints during an active
  connection. A fix for v5.17.
====================

Link: https://patch.msgid.link/20260303-net-mptcp-misc-fixes-7-0-rc2-v1-0-4b5462b6f016@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>