add cached EDE strings

iterator/iterator.c

@@ -373,6 +373,7 @@ error_response_cache(struct module_qstate* qstate, int id, int rcode)
 		err.serve_expired_ttl = NORR_TTL;
 		/* do not waste time trying to validate this servfail */
 		err.security = sec_status_indeterminate;
+		err.reason_bogus_str = NULL;
 		verbose(VERB_ALGO, "store error response in message cache");
 		iter_dns_store(qstate->env, &qstate->qinfo, &err, 0, 0, 0, NULL,
 			qstate->query_flags, qstate->qstarttime);
@@ -3737,6 +3738,9 @@ processFinished(struct module_qstate* qstate, struct iter_qstate* iq,
 	/* make sure QR flag is on */
 	iq->response->rep->flags |= BIT_QR;
 
+	/* explicitly set the EDE string size to 0 */
+	iq->response->rep->reason_bogus_str_size = 0;
+
 	/* we have finished processing this query */
 	qstate->ext_state[id] = module_finished;