Merge branch 'mptcp-cleanups-ephemeral-port-sockopts'

Matthieu Baerts says:

====================
mptcp: cleanup and support more ephemeral ports sockopts

Patch 1 is a cleanup one: mptcp_is_tcpsk() helper was modifying sock_ops
in some cases which is unexpected with that name.

Patch 2 to 4 add support for two socket options: IP_LOCAL_PORT_RANGE and
IP_BIND_ADDRESS_NO_PORT. The first one is a preparation patch, the
second one adds the support while the last one modifies an existing
selftest to validate the new features.
====================

Signed-off-by: Matthieu Baerts <matttbe@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>