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

src/Core/System.php

@@ -239,7 +239,6 @@ class System extends BaseObject
 	/// @todo Move the following functions from boot.php
 	/*
 	function killme()
-	function goaway($s)
 	function local_user()
 	function public_contact()
 	function remote_user()

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');
 	}
 }