Issue #2217371 by Wim Leers: Expose cache tags to reverse proxies: X-Drupal-Cache-Tags header (by just slightly changing an existing header).
Issue #2095195 by yched, fago, Berdir, amateescu, swentel, pfrenssen, Xano: Remove deprecated field_attach_form_*().
Issue #2188031 by olli, damiankloip: Missing row plugin in views ui.
Issue #2101183 by larowlan, andypost, benjy: Move {comment_entity_statistics} to proper service.
Issue #2096717 by -enzo-, chakrapani, sandipmkhairnar, JeroenT, ofry: Add parameter to User::getRoles() to exclude built in rids, (authenticated, anonymous).
Issue #2178581 by damiankloip, penyaskito, Solthun: Add an AnonymousUserSession object in favour of using drupal_anonymous_user().
Issue #2220687 by znerol: Convert system_run_automated_cron into a subscriber for KernelEvents::TERMINATE.
Issue #2210077 by pp, andrei.dincu: Remove content_translation_menu_alter as hook_menu_alter no longer exists.
Issue #2211235 by damiankloip: Add specific annotations for Views handlers.
Issue #2223623 by znerol: Use request stack in theme negotiator.
Issue #2204239 by damiankloip, Sutharsan: Simplify and de-duplicate argument validators.
Issue #2222847 by damiankloip: Simplify Views cache tags to just a list tag per entity type.
Issue #2218691 by dawehner: Move the current user out of the node API chain in book.
Issue #2202999 by thamas: Duplicated lines in style.css of Seven theme.
Issue #2223249 by alexpott: Remove hook_language_insert/update/delete/presave in favour of entity hooks.
Issue #2219661 by damiankloip: Rename ViewExecutable::viewsHandlerTypes to getHandlerTypes.
Issue #2169765 by philipz, Sutharsan, ckrina, c_lehel, LewisNyman: Redesign update.php to be more consistent with the installation process.
Issue #2194563 by anksy, jhodgdon: Edit link on Shortcuts should go to links list not title.
Issue #2222911 by Sutharsan: Wrong return type in ImageInterface::getTookit docblock.
Issue #2208319 by visabhishek, LewisNyman, galooph, rteijeiro: Icon misaligned in admin/reports/updates.