SCTP IPv6 support

The SCTP module allows you to configure the SCTP profile with an IPv6 address and then process the IPv6 traffic. The SCTP module checks every extension header until it finds the SCTP header and then processes the SCTP header and ignores all the other headers. An SCTP endpoint can be a multihomed host with either all IPv4 addresses or all IPv6 addresses. An SCTP endpoint also supports NAT-PT in two directions, from an IPv4 address format to an IPv6 address format, and vice versa.