[FLINK-5639] [rabbitmq connector] Add a note about MPL 1.1 license of…

… Maven dependency

docs/dev/connectors/rabbitmq.md

@@ -23,6 +23,22 @@ specific language governing permissions and limitations
 under the License.
 -->
 
+# License of the RabbitMQ Connector
+
+Flink's RabbitMQ connector defines a Maven dependency on the
+"RabbitMQ AMQP Java Client", licensed under the
+[Mozilla Public License v1.1 (MPL 1.1)](https://www.mozilla.org/en-US/MPL/1.1/).
+
+Flink itself neither reuses source code from the "RabbitMQ AMQP Java Client"
+nor packages binaries from the "RabbitMQ AMQP Java Client".
+
+Users that create and publish derivative work based on Flink's
+RabbitMQ connector (thereby re-distributing the "RabbitMQ AMQP Java Client")
+must be aware that this may be subject to conditions declared
+in the Mozilla Public License v1.1 (MPL 1.1).
+
+# RabbitMQ Connector
+
 This connector provides access to data streams from [RabbitMQ](http://www.rabbitmq.com/). To use this connector, add the following dependency to your project:
 
 {% highlight xml %}

flink-connectors/flink-connector-rabbitmq/README.md

@@ -0,0 +1,13 @@
+# License of the Rabbit MQ Connector
+
+Flink's RabbitMQ connector defines a Maven dependency on the
+"RabbitMQ AMQP Java Client", licensed under the
+Mozilla Public License v1.1 (MPL 1.1).
+
+Flink itself neither reuses source code from the "RabbitMQ AMQP Java Client"
+nor packages binaries from the "RabbitMQ AMQP Java Client".
+
+Users that create and publish derivative work based on Flink's
+RabbitMQ connector (thereby re-distributing the "RabbitMQ AMQP Java Client")
+must be aware that this may be subject to conditions declared
+in the Mozilla Public License v1.1 (MPL 1.1).