[Intl] made RegionBundle and LanguageBundle merge fallback data when using a country-specific locale
[HttpKernel] made code more reliable
[Form] Fixed FormValidator::findClickedButton() not to be called exponentially
[Form] Removed usage of the ChoiceList::getIndicesFor*() methods where they don't offer any performance benefit
[Form] Fixed ChoiceList::get*By*() methods to preserve order and array keys
[Form] Fixed expanded choice field to be marked invalid when unknown choices are submitted
[Form] Improved test coverage of ChoiceList classes
[Form] Removed usage of the ChoiceList::getIndicesFor*() methods where they don't offer any performance benefit
[Form] Fixed ChoiceList::get*By*() methods to preserve order and array keys
[Form] Fixed expanded choice field to be marked invalid when unknown choices are submitted
[Form] Improved test coverage of ChoiceList classes
[DoctrineBridge] Improved test coverage of EntityChoiceList
[DoctrineBridge] Improved test coverage of EntityChoiceList
[Process] Fix #8970 : read output once the process is finished, enable pipe tests on Windows
Fixed docblock in UserInterface::getSalt()

This method can return null, too.
See the line above:

> "This can return null if the password was not encoded using a salt."
merged branch apfelbox/patch-1 (PR #8982)

This PR was submitted for the master branch but it was merged into the 2.2 branch instead (closes #8982).

Discussion
----------

Fixed docblock in UserInterface::getSalt()

This method can return null, too.
See the line above:

> "This can return null if the password was not encoded using a salt."

Commits
-------

3c7b557 Fixed docblock in UserInterface::getSalt()
merged branch romainneutron/process-8970 (PR #8983)

This PR was merged into the 2.2 branch.

Discussion
----------

[Process][2.2] Fix #8970 : read output once the process is finished, enable pipe tests on Windows

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #8970
| License       | MIT

This fix the read of file handles after `proc_close` as described in the issue. I enable some stdin=>stdout pipes tests on windows with some dedicated buffer size. Solving the issue, I finally reproduced this [PHP bug](https://bugs.php.net/bug.php?id=65650) that I first described in my PR note in #8924

Most of Windows usage should be okay, but in case of a program throws lots of output and fills the buffer, some data might be lost/corrupted. Should it be documented ? This is a Windows only known issue.

Commits
-------

1e75cf9 [Process] Fix #8970 : read output once the process is finished, enable pipe tests on Windows
merged branch bschussek/issue5113-2.2 (PR #8980)

This PR was merged into the 2.2 branch.

Discussion
----------

[2.2][Form] Fixed expanded choice field to be marked invalid when unknown choices are submitted

Same as #7940, rebased onto 2.2.

Commits
-------

4d2dc55 [DoctrineBridge] Improved test coverage of EntityChoiceList
9d3628c [Form] Improved test coverage of ChoiceList classes
ed83752 [Form] Fixed expanded choice field to be marked invalid when unknown choices are submitted
30aa1de [Form] Fixed ChoiceList::get*By*() methods to preserve order and array keys
53f292a [Form] Removed usage of the ChoiceList::getIndicesFor*() methods where they don't offer any performance benefit
Merge branch '2.2' into 2.3

* 2.2:
  Fixed docblock in UserInterface::getSalt()
  [Process] Fix #8970 : read output once the process is finished, enable pipe tests on Windows
  [DoctrineBridge] Improved test coverage of EntityChoiceList
  [Form] Improved test coverage of ChoiceList classes
  [Form] Fixed expanded choice field to be marked invalid when unknown choices are submitted
  [Form] Fixed ChoiceList::get*By*() methods to preserve order and array keys
  [Form] Removed usage of the ChoiceList::getIndicesFor*() methods where they don't offer any performance benefit
  [HttpKernel] made code more reliable

Conflicts:
	src/Symfony/Bridge/Doctrine/Tests/Form/ChoiceList/EntityChoiceListTest.php
	src/Symfony/Component/Form/Extension/Core/ChoiceList/ChoiceListInterface.php
	src/Symfony/Component/Form/Extension/Core/EventListener/FixRadioInputListener.php
	src/Symfony/Component/Form/Extension/Core/Type/ChoiceType.php
	src/Symfony/Component/Form/Form.php
	src/Symfony/Component/Form/Tests/Extension/Core/Type/ChoiceTypeTest.php
	src/Symfony/Component/Process/Process.php
	src/Symfony/Component/Process/Tests/AbstractProcessTest.php
merged branch bschussek/issue5113-2.3 (PR #8981)

This PR was merged into the 2.3 branch.

Discussion
----------

[2.3][Form] Fixed expanded choice field to be marked invalid when unknown choices are submitted

Same as #7940, rebased onto 2.3.

Commits
-------

7879f07 [DoctrineBridge] Improved test coverage of EntityChoiceList
58e7c10 [Form] Improved test coverage of ChoiceList classes
9542d72 [Form] Fixed expanded choice field to be marked invalid when unknown choices are submitted
72b8807 [Form] Fixed ChoiceList::get*By*() methods to preserve order and array keys
e1bf07f [Form] Removed usage of the ChoiceList::getIndicesFor*() methods where they don't offer any performance benefit