CSRF warning docs on Request::enableHttpMethodParameterOverride()

[HttpFoundation] fixed the docs so that it gives some explanation about how you are vulnerable to CSRF when you enable the httpMethodeParameterOverride
Removed fixed height from profiler resume box.
[Form] fix form handling with unconventional request methods like OPTIONS
[Config] fix filelocator with empty name
[DependencyInjection] use inheritdoc for loaders
[Validator] Fixed Regex::getHtmlPattern() to work with complex and negated patterns
[Form] Fixed usage of "name" variable in form_start block
[OptionsResolver] fix counting of options

and make sure the tests are compatible with phpunit strict mode
[OptionsResolver] fix invalid value exception formatting
[OptionsResolver] fix calling resolve from within closure
[OptionsResolver] add missing exception based on OutOfBoundsException and clarify message
bug #12291 [Form] Fixed usage of "name" variable in form_start block (webmozart)

This PR was merged into the 2.5 branch.

Discussion
----------

[Form] Fixed usage of "name" variable in form_start block

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #10192
| License       | MIT
| Doc PR        | -

Commits
-------

5839832 [Form] Fixed usage of "name" variable in form_start block
[TwigBundle] minor #12309 fix markup twbs inline radio button
[Routing] serialize the compiled route to speed things up

This also makes the CompiledRoute implement Serializable in order to:
1. make the serialization format shorter
2. have no null bytes in there, which the native serializer add for private properties, and thus would complicate saving in databases etc.
3. We should add to our symfony BC promise, that only classes that implement Serializable are ensured to be deserializable correctly with serialized representations of the class in previous symfony versions.
add XML schema definition for the DebugBundle
bug #12294 [OptionsResolver] fix count() and exceptions (Tobion)

This PR was merged into the 2.6-dev branch.

Discussion
----------

[OptionsResolver] fix count() and exceptions

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

Please see commits.

Commits
-------

b93c4c0 [OptionsResolver] add missing exception based on OutOfBoundsException and clarify message
8bcbcc3 [OptionsResolver] fix calling resolve from within closure
dc1250c [OptionsResolver] fix invalid value exception formatting
6c2130f [OptionsResolver] fix counting of options
[Debug] DI controllable ErrorHandler::register()
feature #12336 [DebugBundle] add XML schema definition for the DebugBundle (xabbuh)

This PR was merged into the 2.6-dev branch.

Discussion
----------

[DebugBundle] add XML schema definition for the DebugBundle

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

Commits
-------

d9c239d add XML schema definition for the DebugBundle
bug #12329 [Routing] serialize the compiled route to speed things up (Tobion)

This PR was merged into the 2.3 branch.

Discussion
----------

[Routing] serialize the compiled route to speed things up

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | not really
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #12012, #12220
| License       | MIT
| Doc PR        | -

This also makes the CompiledRoute implement Serializable in order to:

1. make the serialization format shorter
2. have no null bytes in there, which the native serializer add for private properties, and thus would complicate saving in databases etc.
3.  Since the Route now includes the CompiledRoute in the serialization, the CompiledRoute serialization must be consistent as well. We can only ensure that in future symfony version by implementing Serializable.

We should add to our symfony BC promise, that only classes that implement Serializable are ensured to be deserializable correctly with serialized representations of the class in previous symfony versions.

Commits
-------

fd88de7 [Routing] serialize the compiled route to speed things up
[Kernel] ensure session is saved before sending response