[Document URL]
https://docs.openshift.com/container-platform/4.6/logging/cluster-logging-external.html#cluster-logging-collector-log-forward-kafka_cluster-logging-external

[Section Number and Name] 
Forwarding logs to a Kafka broker

[Describe the issue] 
In the documentation, we have an example about how to define an output to send to one broker like this:
~~~
  outputs:
   - name: app-logs 
     type: kafka 
     url: tls://kafka.example.devlab.com:9093/app-topic 
     secret:
       name: kafka-secret
~~~

But in the CRD [1] it's indicated that it's possible to define one output to send to several brokers and using the same secret.

[Suggestions for improvement]
Include one example where it's defined one output to send to several brokers using the same topic, like this:

~~~
  - name: app-logs 
    type: kafka
    secret:
      name: kafka-secret-dev
    kafka:
      brokers:
        - tls://kafka-broker1.example.com:9093/
        - tls://kafka-broker2.example.com:9093/
        - ...
      topic: app-topic
~~~


[1] https://github.com/openshift/cluster-logging-operator/blob/332dec5d433570f7e315b1629159c81abfe936d4/manifests/4.6/logging.openshift.io_clusterlogforwarders_crd.yaml#L75