$user: user that was watching
$article: article object removed
+'UploadForm:initial': before the upload form is generated
+$form: UploadForm object
+You might set the member-variables $uploadFormTextTop and
+$uploadFormTextAfterSummary to inject text (HTML) either before
+or after the editform.
+
'UploadVerification': additional chances to reject an uploaded file
string $saveName: destination file name
string $tempName: filesystem path to the temporary file for checks