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