Issue #1949724 by chx, effulgentsia, xjm, jibran, rootatwc: Allow simpletest child sites to additionally load a test-specific settings.php to allow testing anonymous and configless updates.

Issue #1935970 by msonnabaum, dawehner, RobLoach: Convert timer_* to a utility class and convert tests to phpunit.

Issue #1875086 by Crell, plach, effulgentsia, sun, msonnabaum, Rob Loach, quicksketch, David_Rothstein: Change notice: Improve DX of drupal_container()->get().

Issue #1853086 by katbailey, msonnabaum, alexpott: Remove cache.page.enabled in favor of an explicit internal cache setting.

Issue #1860026 by aspilicious, David_Rothstein, katbailey, rootatwc: Remove hook_exit() for cached page requests, and decide between it and the onTerminate eventotherwise.

Issue #1907700 by katbailey: Remove language_init() from the array of bootstrap hooks as it no longer exists.

Issue #1899994 by katbailey, plach, YesCT: Disentangle language initialization from path resolution.

Issue #1331486 by katbailey, chx, sun, beejeebus, amateescu: Move module_invoke_*() and friends to an Extensions class.

Revert "Issue #1331486 by katbailey, chx, sun, beejeebus, amateescu: Move module_invoke_*() and friends to an Extensions class. Broke core tests after commit."

This reverts commit c80c3e18.

Issue #1331486 by katbailey, chx, sun, beejeebus, amateescu: Move module_invoke_*() and friends to an Extensions class.

Issue #1778178 by fago, Berdir, effulgentsia, mradcliffe, das-peter: Convert comments to the new Entity Field API.

Issue #1833516 by Berdir, chx, catch, webchick: Add $settings for low-level configuration - move things out of .

Issue #1814086 by samhassell, fgm: Convert autoloader_mode in drupal_classloader() to its own global.

Issue #1158322 follow-up by chx: Fixed htmlspecialchars() expects parameter 1 to be string, array given errors in exception backtraces.

Issue #1873608 by David_Rothstein: Improve documentation of format_string() to emphasize that it is used to prepare variables for HTML display.

Issue #1861604 by hefox: Skip module_invoke()/module_hook() in calling hook_watchdog() (excessive function_exist()).

Issue #1705920 by tim.plunkett, sun, underq, javier.alejandr...: Convert all calls to procedural drupal_array_()*() functions to Drupal\Component\Utility\NestedArray.