sctp: backports from upstream
Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2189292 Tested: lksctp-tools/func_tests
2 features are included in this patchset, SCTP-VRF: patch 3-8, and two new SCTP stream schedulers: patch 16-17. Note I didn't backport the selftest for SCTP-VRF, as it may cause merge conflicts in tools/testing/selftests/net/Makefile if others are backporting other selftests. It's better to leave it to Hangbin's kselftest backport.
Signed-off-by: Xin Long lxin@redhat.com