[Form] Choice children can be template customized like collection
[Serializer] Added PropertyNormalizer, a new normalizer that maps an object's properties to an array
Call AuthenticationManager in AnonymousAuthenticationListener
[HttpKernel] Extract method to make callable controller in ControllerResolver

correct naming
[WebProfilerBundle] turbolinks compatibility
Response::isNotModified returns true when If-Modified-Since is later than Last-Modified
bug #11079 Response::isNotModified returns true when If-Modified-Since is later than Last-Modified (skolodyazhnyy)

This PR was submitted for the master branch but it was merged into the 2.3 branch instead (closes #11079).

Discussion
----------

Response::isNotModified returns true when If-Modified-Since is later than Last-Modified

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #10501,  #10857
| License       | MIT
| Doc PR        |

Patch for #10501. I have reworked a bit `Response::isNotModified` method to make it more readable. Now it's comparing If-Modified-Since and Last-Modified as dates.

Commits
-------

42ec76e Response::isNotModified returns true when If-Modified-Since is later than Last-Modified
[Form] Add a form error if post_max_size has been reached.
minor #11504 [WebProfilerBundle] turbolinks compatibility (DraCzris)

This PR was merged into the 2.3 branch.

Discussion
----------

[WebProfilerBundle] turbolinks compatibility

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

Fix profiler when using turbolinks. (Without this, profiler is rendered without assets)

Commits
-------

c65b4c7 [WebProfilerBundle] turbolinks compatibility
[Form] Moved POST_MAX_SIZE validation from FormValidator to request handler
added the possibility to return null from SimplePreAuthenticationListener
fixed bug
bug #12002 [Security] [Firewall] Bug fixed in SimplePreAuthenticationListener when createToken() not return TokenInterface object (adenkejawen, fabpot)

This PR was merged into the 2.4 branch.

Discussion
----------

[Security] [Firewall] Bug fixed in SimplePreAuthenticationListener when createToken() not return TokenInterface object

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | no
| Fixed tickets | #11490, #11414
| License       | MIT
| Doc PR        |

This is a follow-up for #11414 on the right branch.

Commits
-------

faa8e98 fixed bug
e85cb7f added the possibility to return null from SimplePreAuthenticationListener
bug #11924 [Form] Moved POST_MAX_SIZE validation from FormValidator to request handler (rpg600, webmozart)

This PR was merged into the 2.3 branch.

Discussion
----------

[Form] Moved POST_MAX_SIZE validation from FormValidator to request handler

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #11729, #11877
| License       | MIT
| Doc PR        | -

Commits
-------

759ae1a [Form] Moved POST_MAX_SIZE validation from FormValidator to request handler
4780210 [Form] Add a form error if post_max_size has been reached.
Use request format from request in twig ExceptionController
bug #11904 Make twig ExceptionController conformed with ExceptionListener (megazoll)

This PR was submitted for the master branch but it was merged into the 2.3 branch instead (closes #11904).

Discussion
----------

Make twig ExceptionController conformed with ExceptionListener

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #9083
| License       | MIT
| Doc PR        |

Parameter passed to exception controller from exception listener called ``format``, so variable ``_format`` in exception controller always takes default value.
https://github.com/symfony/symfony/blob/master/src/Symfony/Component/HttpKernel/EventListener/ExceptionListener.php#L120

Commits
-------

24c5ba4 Use request format from request in twig ExceptionController
New php library structure made easier
[Form] Fixed ValidatorTypeGuesser to guess properties without constraints not to be required
bug #12004 [Form] Fixed ValidatorTypeGuesser to guess properties without constraints not to be required (webmozart)

This PR was merged into the 2.3 branch.

Discussion
----------

[Form] Fixed ValidatorTypeGuesser to guess properties without constraints not to be required

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #6645
| License       | MIT
| Doc PR        | -

Consider the following entity:

```php
class Author
{
    /**
     * @Assert\NotBlank
     */
    private $name;

    private $age;
}
```

Right now, the "required" HTML attribute is set for both fields (since the default value of the "required" option is true). IMO this is wrong.

With this fix, the ValidatorTypeGuesser guesses `false` for the "required" option unless a NotNull/NotBlank constraint is present.

Commits
-------

fd77b09 [Form] Fixed ValidatorTypeGuesser to guess properties without constraints not to be required
[Validator] Fixed StaticMethodLoaderTest to actually test something