Replace HTTP link with HTTPS link
This commit replaces an HTTP link in the configuration docs with an
HTTPS link.
@@ -110,7 +110,7 @@ command line with `es.node.name` or in the config file with `node.name`.
[[logging]]
== Logging configuration
-Elasticsearch uses http://logging.apache.org/log4j/2.x/[Log4j 2] for
+Elasticsearch uses https://logging.apache.org/log4j/2.x/[Log4j 2] for
logging. Log4j 2 can be configured using the log4j2.properties
file. Elasticsearch exposes three properties, `${sys:es.logs.base_path},
`${sys:es.logs.cluster_name}`, and `${sys:es.logs.node_name}` (if the node name
