Fix doc: Specify log4j2.configurationFile (log4j.configurationFile does
nothing)
one for JSON, one for YAML, one for properties, and one for XML.
</p>
<ol>
- <li>Log4j will inspect the <code>"log4j.configurationFile"</code> system property and, if set, will attempt to
+ <li>Log4j will inspect the <code>"log4j2.configurationFile"</code> system property and, if set, will attempt to
load the configuration using the <code>ConfigurationFactory</code> that matches the file
extension. Note that this is not restricted to a location on the local file system and may contain
a URL.</li>
