Issue #1630746 by tim.plunkett: Fixed Checking for 'twice the available memory limit' fails when running on a system with a memory_limit() of -1.

Issue #1573556 by disasm, justafish: Fixed Install suggests PHP memory limit is increased when it's already sufficient.

Issue #1038932 by tim.plunkett, Chris Gillis: Theme_image_formatter() assumes that title, alt, and options are always set.

- Patch #1211668 by scito, Devin Carlson, bornholtz: special characters are encoded twice for feed icon attribute title.

Issue #1662950 by chx, mjonesdinero: Document that certain EntityFieldQuery methods exclude entities with empty field values

Issue #1617006 by ben.kyriakou: Add note to drupal_write_record saying not to use it in update functions

Issue #1595146 by Niklas Fiekas, cosmicdreams, Rob Loach, effulgentsia: Added Load the HttpKernel from the DI Container.

Issue #1609760 by chx, sun: Fixed hook_image_style_()*() is not invoked for image styles upon Image module installation.

Issue #1599306 by bojanz, exratione: Fixed field_sync_field_status() needlessly rebuilds module data, slows down installation dramatically.

Issue #1666632 by sun, chx: Add Config::isNew() to allow code to determine whether a config object already exists.

Issue #1496542 by cosmicdreams, sun, chx, vasi1186, aspilicious, alexpott, nadavoid, Pedro Lozano, disasm, andypost | heyrocker: Convert site information to config system.

- Patch #7881 by pwolanin, mikeytown2, gwynnebaer, Patrizio, sylus, effulgentsia: add support to drupal_http_request() for proxy servers.

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.

Issue #1619446 by Niklas Fiekas: Fixed All autocomplete and drupal_json_output() responses are broken (returning Ajax instead of JSON).

- Patch #1651010 by pounard: HttpKernel patch introduces ob_flush() related PHP warnings on my environement, potential patch and performance improvement.

- Patch #1263208 by Niklas Fiekas, BTMash, aiwata55, Berdir, kathyh: upgrade path for blog module removal.

- Patch #1525138 by twistor, Georgique: Fixed Illegal string offset 'field' in function TaxonomyTermController->buildQuery().

- Patch #7881 by mikeytown2, gwynnebaer, Patrizio, sylus, effulgentsia: add support to drupal_http_request() for proxy servers.

Issue #1599554 by sun, dww, effulgentsia: Tutorial/guidelines for how to convert variables into configuration.