ND_RA_FLAG_OTHER
radv->other = nd_ra->nd_ra_flags_reserved & ND_RA_FLAG_OTHER;
(nd_ra->nd_ra_flags_reserved & ND_RA_FLAG_OTHER) ? 1 : 0);
ra->nd_ra_flags_reserved |= ND_RA_FLAG_OTHER;
if (p->nd_ra_flags_reserved & ND_RA_FLAG_OTHER)
(ND_RA_FLAG_MANAGED|ND_RA_FLAG_OTHER))