named-checkconf failed to report dnstap-output missing

from named.conf when dnstap was specified

CHANGES

+5266.	[bug]		named-checkconf failed to report dnstap-output
+			missing from named.conf when dnstap was specified.
+			[GL #1136]
+
 5265.	[bug]		DNS64 and RPZ nodata (CNAME *.) rules interacted badly
 			[GL #1106]

bin/tests/system/dnstap/bad-missing-dnstap-output.conf

+options {
+	dnstap { client; auth; };
+	recursion yes;
+};

lib/bind9/check.c

@@ -1459,6 +1459,16 @@ check_options(const cfg_obj_t *options, isc_log_t *logctx, isc_mem_t *mctx,
 					result = ISC_R_FAILURE;
 			}
 		}
+	} else {
+		(void) cfg_map_get(options, "dnstap", &obj);
+		if (obj != NULL) {
+			cfg_obj_log(obj, logctx, ISC_LOG_ERROR,
+				    "'dnstap-output' must be set if 'dnstap' "
+				    "is set");
+			if (result == ISC_R_SUCCESS) {
+				result = ISC_R_FAILURE;
+			}
+		}
 	}
 #endif