$title: the Title in question
&$model: the model name. Use with CONTENT_MODEL_XXX constants.
-'ContentHandlerForModelName': Called when a ContentHandler is requested for a given
+'ContentHandlerForModelID': Called when a ContentHandler is requested for a given
cointent model name, but no entry for that model exists in $wgContentHandlers.
$modeName: the requested content model name
&$handler: set this to a ContentHandler object, if desired.