SCTP ConnectPeer?: sctp_bindx() to local endpoints
When connecting to an SCTP peer using sctp_connectx() with local
addresses configured with ListenOn?, bind to the ListenOn? addresses
using sctp_bindx() so that the SCTP INIT only contains the
configured local addresses, matching what is advertised in the CER,
and disable SCTP_AUTO_ASCONF.
If no local addresses are configured with ListenOn?, the previous
behaviour of sctp_connectx() and enable SCTP_AUTO_ASCONF is used.