MFC r267674:

Honor jails for unbound SCTP sockets when selecting source addresses,
reporting IP-addresses to the peer during the handshake, adding
addresses to the host, reporting the addresses via the sysctl
interface (used by netstat, for example) and reporting the
addresses to the application via socket options.
This issue was reported by Bernd Walter.
MFC r267682:

Fix a bug in the setsockopt()-handling of the SCTP
specific option SCTP_PEER_ADDR_THLDS: Use the
provided address as intended.
MFC r267688:

Fix a bug which incorrectly allowed two listening SCTP sockets on
the same port bound to the wildcard address.
MFC r267254:
Make mmap(MAP_STACK) search for the available address space.

MFC r267497 (by alc):
Use local variable instead of sgrowsiz.