Merge branch 'mptcp-fixes'

Mat Martineau says:

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mptcp: Disconnect and selftest fixes

Patch 1 switches to a safe list iterator in the MPTCP disconnect code.

Patch 2 adds the userspace_pm.sh selftest script to the MPTCP selftest
Makefile, resolving the netdev/check_selftest CI failure.
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Signed-off-by: David S. Miller <davem@davemloft.net>