in6_pcbconnect
error = in6_pcbconnect(inp, &sin6, thread0.td_ucred, false);
error = in6_pcbconnect(inp, sin6, td->td_ucred, true);
int in6_pcbconnect(struct inpcb *, struct sockaddr_in6 *, struct ucred *,
error = in6_pcbconnect(inp, sin6, td->td_ucred, true);