OPTION_MPTCP_FASTCLOSE
if ((mp_opt.suboptions & OPTION_MPTCP_FASTCLOSE) &&
} else if (unlikely(OPTION_MPTCP_FASTCLOSE & opts->suboptions)) {
mp_opt->suboptions |= OPTION_MPTCP_FASTCLOSE;
opts->suboptions |= OPTION_MPTCP_FASTCLOSE;