Renamed System::redirect() to $a->redirect()

src/Core/UserImport.php

@@ -272,6 +272,6 @@ class UserImport
 		Worker::add(PRIORITY_HIGH, 'Notifier', 'relocate', $newuid);
 
 		info(L10n::t("Done. You can now login with your username and password"));
-		goaway(System::baseUrl() . "/login");
+		$a->redirect('login');
 	}
 }