Special:Log for a specific log type
$type: String of log type being displayed
$logEventsList: LogEventsList object for context and access to the WebRequest
-&$input: string HTML of an input element
+&$formDescriptor: array HTMLForm's form descriptor
'LogEventsListShowLogExtract': Called before the string is added to OutputPage.
Returning false will prevent the string from being added to the OutputPage.