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

Issue #1356170 by ohnobinki, tim.plunkett: Remove all uses of array_merge_recursive(), or document why they are being used instead of NestedArray::mergeDeep().

Issue #1849700 by katbailey, effulgentsia: Fixed DrupalKernel's container.modules param should contain module filenames, not full namespace paths.

Issue #1808200 by sun: Fixed Unit test performance significantly decreased since system list config conversion.

Issue #1697256 by heyrocker, alexpott, sun, xjm, webchick: Create a UI for importing new configuration.

Issue #1830170 by fubhy: Fixed module_list() doesn't register namespaces with the classloader when given a fixed module list.

Issue #1708692 by xjm, effulgentsia, tim.plunkett, fubhy, Berdir, chx: Fixed Bundle services aren't available in the request that enables the module.

Issue #1608842 by chx, alexpott, sun, effulgentsia, beejeebus, tim.plunkett et al: Replace list of bootstrap modules, enabled modules, enabled themes, and default theme with config.

Issue #1040790 by yched, swentel, geerlingguy, beejeebus, Berdir: Fixed _field_info_collate_fields() memory usage.

Issue #1215104 by sun, lucascaro, effulgentsia: Use the non-interactive installer in WebTestBase::setUp().

Issue #1708722 by David_Rothstein, kim.pepper: Fixed Call to undefined function drupal_find_base_themes() in /includes/module.inc on line 184.

Issue #1061924 by catch, tim.plunkett, sun, Stefan Freudenberg, bfroehle: Fixed system_list() memory usage.

Issue #1605324 by sun, Jose Reyero, alexpott, chx, Rob Loach | beejeebus: Configuration system cleanup and rearchitecture.

Revert "- Patch #1605324 by sun, Jose Reyero, alexpott, chx, Rob Loach, beejeebus: configuration system cleanup and rearchitecture."

This reverts commit 8df23c8a. Original commit
was missing some files. Trying again.

- Patch #1605324 by sun, Jose Reyero, alexpott, chx, Rob Loach, beejeebus: configuration system cleanup and rearchitecture.

- Patch #1617208 by effulgentsia, neclimdul: after kernel patch, module_hook_info() returns an empty array when called by load callback, access callback, or hook_init().

- Patch #1404198 by sun, beejeebus, fago, chx: Separate database cache clearing from static cache clearing and data structure rebuilding.

Issue #1213536 by David_Rothstein, sun, effulgentsia, Yorirou: Fixed Non-resettable theme_get_registry() cache causes problems for non-interactive installations.

Issue #1467126 by effulgentsia, Rob Loach, sun, catch, amateescu, yched, EclipseGc: Fixed Provider based PSR-0 Classes that load more than once.

Issue #761608 by JohnAlbin: Fixed Missing theme settings values because list_themes() has inconsistent theme object data.