RNF_ACTIVE
tt->rn_flags &= ~RNF_ACTIVE;
tt[1].rn_flags &= ~RNF_ACTIVE;
tt->rn_flags = t->rn_flags = RNF_ROOT | RNF_ACTIVE;
tt->rn_flags = t->rn_flags = RNF_ACTIVE;
tt->rn_flags = RNF_ACTIVE;
if (t->rn_flags & RNF_ACTIVE) {