Merge branch 'mptcp-pm-misc-fixes-for-v7-1-rc3'

Matthieu Baerts says:

====================
mptcp: pm: misc. fixes for v7.1-rc3

Here are various fixes, mainly related to ADD_ADDRs:

- Patch 1: save ADD_ADDR for rtx with ID0 when needed. A fix for v6.1.

- Patch 2: remove unneeded exception for ID 0. A fix for v5.10.

- Patches 3-5: fix potential data-race and leaks during ADD_ADDR rtx. A
  fix for v5.10.

- Patch 6: resched blocked ADD_ADDR rtx after a more appropriated
  timeout, not after 15 seconds. A fix for v5.10.

- Patch 7: skip inactive subflows when when looking at the max RTO. A
  fix for v6.18.

- Patch 8: avoid iterating over all subflows when there is no need to. A
  fix for v6.18.

- Patch 9: skip closed subflows when looking at sending MP_PRIO. A fix
  for v5.17.

- Patch 10: properly catch errors when using check_output() in the
  selftests. A fix for v6.9.

- Patch 11: skip the 'unknown' flag test when 'ip mptcp' is used. A fix
  for v6.10.
====================

Link: https://patch.msgid.link/20260505-net-mptcp-pm-fixes-7-1-rc3-v1-0-fca8091060a4@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>