Issue #3376846 by kristiaanvandeneynde, larowlan, smustgrave, catch: Implement the new access policy API

Issue #3348092 by andypost, alexpott, Ranjit1032002, smustgrave, catch: Deprecate user_role_permissions()

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

Issue #2501117 by catch, olli, Wim Leers, dawehner: Add static caching for PermissionsHashGenerator::generate()

Issue #2417895 by David_Rothstein, Berdir, Wim Leers, willzyx, catch: AccountPermissionsCacheContext/PermissionsHashGenerator must special case user 1, since permissions don't apply to it

Issue #2428703 by Wim Leers: Add a 'user.permissions' cache context (was: "Should cache contexts be able to associate a cache tag?")

Issue #2040135 by Wim Leers, Berdir: Caches dependent on simple config are only invalidated on form submissions

Issue #2340123 by Wim Leers: Setting cache tags can be tricky: use strings instead of nested arrays to improve DX.

Issue #2217749 by Wim Leers, Jalandhar, visabhishek, damiankloip: Entity base class should provide standardized cache tags and built-in invalidation.

Issue #2169447 by damiankloip, sun, longwave: DX: Supply CacheBackendInterface::CACHE_PERMANENT as Cache::PERMANENT.

Issue #2005644 by Wim Leers, damiankloip, beejeebus, amateescu: Use client-side cache tags & caching to eliminate 1 HTTP requests/page for in-place editing metadata, introduce drupalSettings.user.permissionsHash.