F_BACKUP
} else if (flags & F_BACKUP) {
else if (rdr->conf.flags & F_BACKUP)
rlt->rlt_flags |= F_BACKUP;
rdr->conf.flags &= ~(F_BACKUP);
rdr->conf.flags |= F_BACKUP;
rt->rt_conf.flags &= ~(F_BACKUP);
a.flags &= ~(F_USED|F_BACKUP);
b.flags &= ~(F_USED|F_BACKUP);