In this iteration I tried to address the comments from Mat && Mat
on patch 2/3. Other patches are unchanged.

Changes from v2:
- many layout/comments fixup in patch 2/3, see the indivdual
  patch changelog for the details

Changes from V1:
- none, just repost to hopefully not confuse patchwork
  (and surely spam you more, sorry)

Changes from RFC v2:

- move sockopt related helper in a new file
- rebased on top of the above

Paolo Abeni (3):
  mptcp: move sockopt function into a new file
  mptcp: only admit explicitly supported sockopt
  mptcp: revert "mptcp: provide subflow aware release function"

 net/mptcp/Makefile   |   2 +-
 net/mptcp/protocol.c | 165 +-------------------
 net/mptcp/protocol.h |   5 +
 net/mptcp/sockopt.c  | 349 +++++++++++++++++++++++++++++++++++++++++++
 4 files changed, 357 insertions(+), 164 deletions(-)
 create mode 100644 net/mptcp/sockopt.c

-- 
2.26.2