F_USED
env->sc_proto_default.flags = F_USED;
p->flags |= F_USED;
rlt->rlt_table->conf.flags |= F_USED;
rlt->rlt_flags = F_USED;
router->rt_gwtable->conf.flags |= F_USED;
if (!(table->conf.flags & F_USED)) {
if (!(proto->flags & F_USED)) {
$3->conf.flags |= F_USED;
if ((rlt->rlt_flags & F_USED) == 0 ||
a.flags &= ~(F_USED|F_BACKUP);
b.flags &= ~(F_USED|F_BACKUP);