TASK: Use _local_ instead of 127.0.0.1 as best practice

which also listens on ::1

Author: daniellienert

Documentation/ElasticConfiguration-5.x.md

@@ -8,7 +8,7 @@ But the following can make your life easier:
 # the following settings secure your cluster
 cluster.name: [PUT_YOUR_CUSTOM_NAME_HERE]
 node.name: [PUT_YOUR_CUSTOM_NAME_HERE]
-network.host: 127.0.0.1
+network.host: _local_
 ```
 
 **Note:** When using Elasticsearch 5.x changes to the mapping may be needed.