test case files matching the suffix "Test.php".
&$paths: list of test cases and directories to search.
-'UnknownAction': DEPRECATED since 1.19! To add an action in an extension,
-create a subclass of Action, and add a new key to $wgActions.
-An unknown "action" has occurred (useful for defining your own actions).
-$action: action name
-$article: article "acted on"
-
'UnwatchArticle': Before a watch is removed from an article.
&$user: user watching
&$page: WikiPage object to be removed