Typo and better wording for german validator translation
minor #9599 [Validator] Typo and better wording for german validator translation (Danez)

This PR was submitted for the master branch but it was merged into the 2.3 branch instead (closes #9599).

Discussion
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[Validator] Typo and better wording for german validator translation

Follow up of #9588 as supposed by @craue

Commits
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263b618 Typo and better wording for german validator translation
fixed @expectedException class names
fixed some typos
Adjusting CacheClear Warmup method to namespaced kernels

Backported the patch in #9525 to the 2.3 branch.
minor #9603 Fixed some typos (fabpot)

This PR was merged into the 2.2 branch.

Discussion
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Fixed some typos

Commits
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5c6edb3 fixed some typos
8d69bb5 fixed @expectedException class names
Merge branch '2.2' into 2.3

* 2.2:
  fixed some typos
  fixed @expectedException class names

Conflicts:
	src/Symfony/Component/Config/Tests/Definition/ArrayNodeTest.php
	src/Symfony/Component/Console/Tests/Command/CommandTest.php
	src/Symfony/Component/Locale/Tests/Stub/StubLocaleTest.php
	src/Symfony/Component/Locale/Tests/Stub/StubNumberFormatterTest.php
fixed @expectedException class names
fixed typos
Container::camelize also takes backslashes into consideration
bug #9610 Container::camelize also takes backslashes into consideration (ondrejmirtes)

This PR was submitted for the 2.4 branch but it was merged into the 2.3 branch instead (closes #9610).

Discussion
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Container::camelize also takes backslashes into consideration

I [complained](https://github.com/symfony/symfony/pull/8494) about unreported and unnoticed BC break.

Service names in our DI container contain backslashes and that pull request rendered newer versions of Symfony unusable for us.

This commit fixes this - it normalizes backslashes in service names into underscores.

Commits
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0f9bb0a Container::camelize also takes backslashes into consideration
Fixed mistake in upgrade docu
minor #9616 Fixed mistake in upgrade docu (theaxel)

This PR was submitted for the master branch but it was merged into the 2.3 branch instead (closes #9616).

Discussion
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Fixed mistake in upgrade docu

Commits
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821006b Fixed mistake in upgrade docu
[HttpKernel] fixed regression introduced in 2.4 in the base DataCollector class. Added more unit tests coverage for the RequestDataCollector object.
bug #9617 [HttpKernel] Http kernel regression fix (hhamon)

This PR was merged into the 2.4 branch.

Discussion
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[HttpKernel] Http kernel regression fix

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

Commits
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d1e5006 [HttpKernel] fixed regression introduced in 2.4 in the base DataCollector class. Added more unit tests coverage for the RequestDataCollector object.
Merge branch '2.3' into 2.4

* 2.3:
  Fixed mistake in upgrade docu
  Container::camelize also takes backslashes into consideration
  fixed typos
  fixed @expectedException class names
  fixed some typos
  fixed @expectedException class names
  Typo and better wording for german validator translation
bug #9605 Adjusting CacheClear Warmup method to namespaced kernels (rdohms)

This PR was merged into the 2.3 branch.

Discussion
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Adjusting CacheClear Warmup method to namespaced kernels

Backported the patch in #9525 to the 2.3 branch.

| Q             | A
| ------------- | ---
| Bug fix?      | [yes]
| New feature?  | [no]
| BC breaks?    | [no]
| Deprecations? | [no]
| Tests pass?   | have not tried yet
| License       | MIT
| Fixed tickets | further fixes #1431

My kernel has been moved and namespaced to `Cfs\Bundle\MultiSiteBundle\Kernel\CfsKernel`. This worked fine until a change was made to how the kernel temp stuff is handled in the warmup phase.

When the app generates its own cache (i.e you run cache without warmup and access the site) everything is generated ok and the .meta files generate the proper reference to the FQN of the Kernel.

However if the warmup is used, it uses `Cfs\Bundle\MultiSiteBundle\Kernel\CfsKerne_` as the temporary Kernel, and when it does "fix references to the Kernel in .meta files" it generates 2 errors.

1. It does not use a string safe tempKernel name, so it never finds the reference to the kernel
2. If you fix that, then it replaces the FQN of the tempKernel with `CfsKernel`, the non-namespaced name of the proper Kernel (it also leaves the character count wrong in the serialization `C:43:<class>` where 43 is the char count for the FQN above)

The two changes above fix this, by escaping the string and replacing it with a FQN Kernel Class name.

What are your thoughts on this? If this sounds reasonable i'll do further enhancements and check tests.

Commits
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00d79d5 Adjusting CacheClear Warmup method to namespaced kernels
Fix undefined offset when formatting namespace suggestions
bug #9624 [Console] Fix undefined offset when formatting namespace suggestions (GromNaN)

This PR was submitted for the master branch but it was merged into the 2.4 branch instead (closes #9624).

Discussion
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[Console] Fix undefined offset when formatting namespace suggestions

[`preg_grep`](http://www.php.net/manual/en/function.preg-grep.php) returns an array indexed using the keys from the input array. `array_values` is used in the method `find`, but was missing in `findNamespace`.

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #9614
| License       | MIT
| Doc PR        | n/a

Edit: should be merged to 2.4

Commits
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f5c4011 [Console] Fix undefined offset when formatting namespace suggestions
When getting the session's id, check if the session is not closed

This introduced a regression from #9246, with an incomplete fix ;
As the `started` flag on the NativeSessionStorage was not `true`
anymore when saving the session, the session id was always empty
when saving it, and thus when sending the `PHPSESSID` cookie