add allow_extra_fields option
[SecurityBundle] added acl:set command
Allow overloading ContextListener::refreshUser()
Fix issue #10867
Update MessageSelector.php to show which value was passed

When the translator can't find a correct match using transChoice() a string is logged today with the following text:
<code>Unable to choose a translation for "<string>" with locale "<locale>". Double check that this translation has the correct plural options (e.g. "There is one apple|There are %%count%% apples").</code>
This change introduces the value that was passed to transChoice() to the developer will have more information as to what value did not match any of the translation options:
<code>Unable to choose a translation for "<string>" with locale "<locale>" for value "<value>". Double check that this translation has the correct plural options (e.g. "There is one apple|There are %%count%% apples").</code>
[HttpKernel] Replace sha1 with sha256 in recently added tests.
bug #10904 [HttpKernel] Replace sha1 with sha256 in recently added tests (jakzal)

This PR was merged into the 2.4 branch.

Discussion
----------

[HttpKernel] Replace sha1 with sha256 in recently added tests

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

Tests were introduced in #10896 and are broken starting with 2.4, since the hashing algorithm has changed (introduced in #8609).

Commits
-------

255544f [HttpKernel] Replace sha1 with sha256 in recently added tests.
Fixed incorrect regular plural for -ves words

Fixes singularization for words like caves (cave), staves (staff).
bug #10909 [PropertyAccess] Fixed plurals for -ves words (csarrazi)

This PR was merged into the 2.3 branch.

Discussion
----------

[PropertyAccess] Fixed plurals for -ves words

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

Fixes singularization for words like caves (cave), staves (staff).

Commits
-------

c7a77c5 Fixed incorrect regular plural for -ves words
[Form] Automatically add step attribute to HTML5 time widgets to display seconds if needed
bug #10777 [Form] Automatically add step attribute to HTML5 time widgets to display seconds if needed (tucksaun)

This PR was squashed before being merged into the 2.3 branch (closes #10777).

Discussion
----------

[Form] Automatically add step attribute to HTML5 time widgets to display seconds if needed

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #9976, #10203
| License       | MIT
| Doc PR        | none

Same issue as #9976 and #10203: when you add a `time` field to a form with options `single_text` (so HTML5) and `with_seconds`, the generated input does not contain the `step` attribute, therefore the browser does not show them, leading to an error at the submit because of an invalid format.

Compared to #9976/#10203:
* Unit testable
* Available directly in the component
* Available in other templating format than twig
* Still able to customise the step attribute by hand

Commits
-------

a379298 [Form] Automatically add step attribute to HTML5 time widgets to display seconds if needed
Merge branch '2.3' into 2.4

* 2.3:
  [Form] Automatically add step attribute to HTML5 time widgets to display seconds if needed
  Fixed incorrect regular plural for -ves words
Merge branch '2.4'

* 2.4:
  [Form] Automatically add step attribute to HTML5 time widgets to display seconds if needed
  Fixed incorrect regular plural for -ves words
  [HttpKernel] Replace sha1 with sha256 in recently added tests.
Updated form dev dependencies
Fixed FormDataExtractorTest_SimpleValueExporter::exportValue not implementing the interface correctly
minor #10911 [Form] Composer dependencies (csarrazi)

This PR was merged into the 2.4 branch.

Discussion
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[Form] Composer dependencies

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

Right now, launching tests from the Form component's directory doesn't work, due to missing dev dependencies. This should be merged back into master afterwards.

Also fixed a problem related to a bad method signature in ```Symfony\Component\Form\Tests\Extension\DataCollector\FormDataExtractorTest_SimpleValueExporter```

Commits
-------

7b5857c Fixed FormDataExtractorTest_SimpleValueExporter::exportValue not implementing the interface correctly
e4fa5d8 Updated form dev dependencies
Fixed YAML Parser does not ignore duplicate keys, violating YAML spec.

The current [YAML 1.2] specification clearly states:

> JSON's RFC4627 requires that mappings keys merely “SHOULD” be unique, while YAML insists they “MUST” be.

The outdated [YAML 1.1] spec contained a crystal clear note on how the error of duplicate keys is to be handled by parsers, which is (sadly) no longer contained in the latest 1.2 spec (only leaving the requirement):

> It is an error for two equal keys to appear in the same mapping node.  In such a case the YAML processor may continue, ignoring the second `key: value` pair and issuing an appropriate warning.  This strategy preserves a consistent information model for one-pass and random access applications.

[YAML 1.2]: http://yaml.org/spec/1.2/spec.html#id2759572
[YAML 1.1]: http://yaml.org/spec/1.1/#id932806
[Validator] Updated outdated dependencies.
Added support for injecting HttpFoundation's RequestStack in ServerParams
feature #10912 [Form] Added support for injecting HttpFoundation's Request in ServerParams for the Validator extension (csarrazi)

This PR was merged into the 2.4-dev branch.

Discussion
----------

[Form] Added support for injecting HttpFoundation's Request in ServerParams for the Validator extension

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | yes
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #10009
| License       | MIT
| Doc PR        | -

The Request object should be injected in the ```ServerParams``` object before using it in the extension, if one wishes to use Symfony2's ```Request``` to fetch the server parameters.

Commits
-------

86f9cb9 Added support for injecting HttpFoundation's RequestStack in ServerParams