HFCF_ECN
hfsc_opts.flags |= HFCF_RED|HFCF_ECN;
if (opts->flags & HFCF_ECN)
if (flags & HFCF_ECN)
flags |= HFCF_ECN;
if ((flags & HFCF_ECN) && (flags & (HFCF_RED|HFCF_RIO)) == 0)