Issue #2232385 by Wim Leers: Cacheable 'Syndicate' block: never cache it, because it's cheaper to always render it.
Issue #2226665 by swentel, Wim Leers: Only set 'add more' wrapper on fields with cardinality >1.
Issue #2228627 by tim.plunkett: Core/tests/Drupal/Tests/Component/Utility/UrlHelperTest.php is actually UrlTest.
Issue #2225539 by znerol: Use request stack in admin context service.
Issue #2228941 by larowlan, andrei.dincu | Cottser: PHP notice displayed for forum blocks when there are no forum topics.
Issue #2089433 by ianthomas_uk, grom358, herom, thedavidmeister, visabhishek, longwave, Sweetchuck: Remove uses of deprecated XSS filter functions.