Issue #1818556 by das-peter, plach, fago, Berdir, vijaycs85: Change notice: Convert nodes to the new Entity Field API.
Issue #1938660 by fabpot: Fixed Remove the custom ExceptionListener class.
Issue #1934716 by alexpott: Merge system.fast_404 config object into system.performance.
Issue #1898060 by taslett, jenlampton, Cottser: Remove all (useless) theme functions from dblog module, so we don't have to convert to Twig.
Rollback of Issue #1937140 by Berdir: image_jpeg_quality logically belongs to image toolkits, so will handle it as part of converting those to plugins.
Issue #1938158 by MegaChriz: Fixed code style of image module configuration schema.
Issue #1933548 by alexpott: Fixed Book allowed_types() settings repetitive and in under certain conditions can change unexpectedly.
Issue #1869424 by sandykadam: Use the terms 'form api' and 'rest api' instead of 'web api'.
Issue #1793042 by webchick: Fixed Notice: Use of undefined constant langcode in _update_message_text() (line 605 of update.module) when installing Drupal 8.x.
Issue #1209226 by catch, Berdir, miro_dietiker, beejeebus, dagmar: Fixed Avoid slow query for path alias whitelists.