removed second parameter from WebController::redirect(), refs #184, removed Controller (used to be global) shutdown call from there, too, refs #182. not exactly sure what implications this has, but I'm better safe than sorry, because shutdown() actually used to be called twice before, and I can't really see why we would need to shutdown before the redirect, this doesn't happen under normal circumstances either, since no matter if we bail out using exit() or not, registered shutdown functions get called (at least I hope so)