dns_conf: fix speed-check-mode option incorrect issue.

src/dns_conf.c

@@ -1175,6 +1175,7 @@ static int _config_speed_check_mode_parser(struct dns_domain_check_orders *check
 	int i = 0;
 
 	safe_strncpy(tmpbuff, mode, DNS_MAX_OPT_LEN);
+	memset(check_orders, 0, sizeof(*check_orders));
 
 	ptr = tmpbuff;
 	do {

src/dns_server.c

@@ -2613,6 +2613,7 @@ static int _dns_server_process_answer(struct dns_request *request, const char *d
 					continue;
 				}
 				safe_strncpy(cname, domain_cname, DNS_MAX_CNAME_LEN);
+				request->ttl_cname = _dns_server_get_conf_ttl(ttl);;
 				tlog(TLOG_DEBUG, "name: %s ttl: %d cname: %s\n", name, ttl, cname);
 			} break;
 			case DNS_T_SOA: {