Issue #2057589 by smiletrl, tim.plunkett, alexpott, dawehner: Rename ControllerInterface to ContainerInjectionInterface.
Issue #1987728 by Niklas Fiekas, vijaycs85: Convert language_test_subrequest() to a new style controller.
Issue #1998140 by dawehner, ParisLiakos, tim.plunkett: Remove backward compatible ControllerInterface.
Issue #1922454 by thedavidmeister, steveoliver, Cottser: Gut l(), fix theme('link'), have a working framework for consistently generated links inside and outside of Twig.
catch authored