The [documentation] provides information about space delimited URIs in list parameters that allow the ES plugins to define multiple hosts in environment variables. However, this documentation is not clear because it doesn't directly answer the question "How do define multiple hosts in environment variables for ES plugins".

While the doc focuses on explaining how on what this provide from a "technical" perspective, it is not too user friendly. A few suggestions could be that:

• Change the title of the feature (e.g. How to define multiple URIs in Environment Variables)
• Provide an example
• Include/link this from the plugins doc.

[documentation] https://www.elastic.co/guide/en/logstash/7.9/plugin-concepts.html#space-delimited-uris-in-list-params