Merge pull request #669 from bendem/fix/mqtt-callback-extended-discoverability

Improve discoverability of MqttCallbackExtended

Author: Ranjan Dasgupta

org.eclipse.paho.client.mqttv3/src/main/java/org/eclipse/paho/client/mqttv3/IMqttClient.java

@@ -847,6 +847,7 @@ public interface IMqttClient extends AutoCloseable { //extends IMqttAsyncClient
 	 * as connect and subscribe can be tracked using the {@link MqttToken} passed to the
 	 * operation<p>
 	 * @see MqttCallback
+	 * @see MqttCallbackExtended
 	 * @param callback the class to callback when for events related to the client
 	 */
     void setCallback(MqttCallback callback);

org.eclipse.paho.client.mqttv3/src/main/java/org/eclipse/paho/client/mqttv3/MqttCallback.java

@@ -22,6 +22,7 @@
  * Classes implementing this interface
  * can be registered on both types of client: {@link IMqttClient#setCallback(MqttCallback)}
  * and {@link IMqttAsyncClient#setCallback(MqttCallback)}
+ * @see MqttCallbackExtended
  */
 public interface MqttCallback {
 	/**