Update src/Symfony/Component/HttpFoundation/Request.php

This makes `getContentType()` work when a regular form is submitted.
[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
SSI support
Disallow abstract definitions from doctrine event listener registration
[HttpFoundation] ResponseHeaderBag::clearCookie now accepts secure/httpOnly
Add missing dot at the end of an exception message
[Translation:update][Xliff Dumper] added target-language.
Added verbosity methods
Added line feed to container alias description (text descriptor)
New service to simplify password encoding
[Form] Check if IntlDateFormatter constructor returned a valid object before using it
remove the scope from the output of the container:debug command
ISSUE #11300: Improve Routing Syntax Import Error

modified FileLoaderLoadException message to present the previous (Parse)Exception first
Add test and small code fix
[2.3][Form] Cleanup & fix phpdocs
minor #11274 Added verbosity methods to NullOutput (WouterJ)

This PR was merged into the 2.4 branch.

Discussion
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Added verbosity methods to NullOutput

These 4 methods were not added to the OutputInterface because of BC, but they should still be implemented in all classes which implement that interface. Otherwise we have to do nasty tricks...

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

Commits
-------

0459249 Added verbosity methods
[Upgrade] Fixed markdown syntax