preserveHost config.yml wording seems wrong

[amouat]

The config.yml says:

# When this setting’s value is true Kibana uses the hostname specified in the server.host
# setting. When the value of this setting is false, Kibana uses the hostname of the host
# that connects to this Kibana instance.
# elasticsearch.preserveHost: true

But this seems directly contradictory to https://www.elastic.co/guide/en/kibana/current/kibana-server-properties.html

By default, the host specified in the incoming request from the browser is specified as the host in the corresponding request Kibana sends to Elasticsearch. If you set this option to false, Kibana uses the host specified in elasticsearch_url.

I think the on-line docs are correct.

Also, it would be really nice if values such as these could be set in the Docker container via environment variables. Do you want me to open a separate issue for that?

[kobelb]

Closing in favor of #17242 as this setting doesn't do anything.