Merge branch 'mptcp-socket-option-updates'

Mat Martineau says:

====================
mptcp: Socket option updates

Patches 1 and 3 refactor a recent socket option helper function for more
generic use, and make use of it in a couple of places.

Patch 2 adds TCP_FASTOPEN_NO_COOKIE functionality to MPTCP sockets,
similar to TCP_FASTOPEN_CONNECT support recently added in v6.1
====================

Link: https://lore.kernel.org/r/20221022004505.160988-1-mathew.j.martineau@linux.intel.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>