Issue #2665992 by alexpott, klausi, heykarthikwithu, xjm, tstoeckler: @file is not required for classes, interfaces and traits

Issue #2331079 by znerol, dawehner: Use RouteMatch in access-checks and remove RequestHelper::duplicate().

Issue #2078855 by dawehner, pwolanin: Fixed Request::create() is slow, use a helper to duplicate instead.