Issue #11532 Translated 78 in Català
[Console] Roll back changes made to fixture files.

Original change was made in e9022adaef40330a92bdf0916bf0b995f942c7fa.
[DependencyInjection] Roll back changes made to generated files.

Original change was made in e9022adaef40330a92bdf0916bf0b995f942c7fa.
minor #11528 [Validator] German translation for empty file errors (xabbuh)

This PR was merged into the 2.6-dev branch.

Discussion
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[Validator] German translation for empty file errors

| Q             | A
| ------------- | ---
| Fixed tickets | part of #11489
| License       | MIT

Commits
-------

412f04f [Validator] German translation for empty file errors
bug #11428 [Serializer] properly handle null data when denormalizing (xabbuh)

This PR was merged into the 2.3 branch.

Discussion
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[Serializer] properly handle null data when denormalizing

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #10794
| License       | MIT
| Doc PR        |

Commits
-------

123fc62 properly handle null data when denormalizing
minor #11537 Make builds green again (jakzal)

This PR was merged into the 2.3 branch.

Discussion
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Make builds green again

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

This PR rolls back changes made to the fixture and generated files in e9022adaef40330a92bdf0916bf0b995f942c7fa (#11512).

Commits
-------

88b4e70 [DependencyInjection] Roll back changes made to generated files.
f89811d [Console] Roll back changes made to fixture files.
minor #11531 [HttpKernel][FrameworkBundle] Replaced ESI mentions with SSI when appropriate (pgodel)

This PR was merged into the 2.6-dev branch.

Discussion
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[HttpKernel][FrameworkBundle] Replaced ESI mentions with SSI when appropriate

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

Commits
-------

7ee23c1 Replaced ESI mentions with SSI when appropriate
minor #11534 Issue #11489 Translated 78 in Català (mmoreram)

This PR was merged into the 2.6-dev branch.

Discussion
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Issue #11489 Translated 78 in Català

Just 78 is created because 73 to 77 are in another PR to branch 2.4.

Commits
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88eac04 Issue #11532 Translated 78 in Català
minor #11533 Issue #11489 Added some CA and ES translations (mmoreram)

This PR was merged into the 2.4 branch.

Discussion
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Issue #11489 Added some CA and ES translations

* Added some translations in CA
* Fixed some translations in ES

Commits
-------

67a6b75 Issue #11489 Added some CA and ES translations
[Process] Fix tests when pcntl is not available.
minor #11539 [Process] Fix tests when pcntl is not available. (jakzal)

This PR was merged into the 2.3 branch.

Discussion
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[Process] Fix tests when pcntl is not available.

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

It's solved the same way in the [AbstractProcessTest](https://github.com/symfony/symfony/blob/3b837dc5c102b8210b7038029416c0524d5f458b/src/Symfony/Component/Process/Tests/AbstractProcessTest.php#L602-L603).

Commits
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e40f24f [Process] Fix tests when pcntl is not available.
Fixed self-reference in 'service_container' service breaks garbage collection (and clone).
bug #11422 [DependencyInjection] Self-referenced 'service_container' service breaks garbage collection (sun)

This PR was submitted for the master branch but it was merged into the 2.3 branch instead (closes #11422).

Discussion
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[DependencyInjection] Self-referenced 'service_container' service breaks garbage collection

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Needs merge to | 2.4
| Fixed tickets | —
| License       | MIT
| Doc PR        | —

#### Problem
1. `Container::__construct()` sets the `service_container` service ID to a self-reference of `$this`.
1. This breaks PHP garbage collection (as well as `clone`).

#### Background
* As explained in [Reference Counting Basics](http://php.net/manual/en/features.gc.refcounting-basics.php), PHP is not able to destruct and garbage collect variables that contain a reference to itself, because the `refcount` is always > 0.

#### Example Use-Case
A precompiled container that is cloned for multiple tests (because `::compile()` can be slow).

```php
$precompiled = new ContainerBuilder();
// ...
$precompiled->compile();
foreach ($precompiled->getServiceIds() as $id) {
  if ($precompiled->initialized($id)) {
    $precompiled->set($id, null);
  }
}
$precompiled_clean = clone $precompiled;
$precompiled = NULL;
// ...
foreach ($tests as $test) {
  $container = clone $precompiled_clean;
  // Required without this PR:
  $container->set('service_container', $container);
  // ...
}
```

* **Actual result [master]:**
  All references to the original `$precompiled` container are not destructed and cleaned up, because `$precompiled` still references itself, which can cause terribly hard to debug defects due to stale reference pointers in memory (especially with `ContainerAware` services, or things like e.g. PDO connections), as well as high memory consumption, etc.

* **Expected result [PR]:**
  No references to `$precompiled` are left; everything is shut down, cleaned up, and garbage-collected upon `$precompiled = NULL;`

#### Proposed solution
1. Hard-code a special behavior for the service ID `service_container`.
1. Remove the self-reference.
1. For now (until next major release), ensure that all `Container` methods work identically to before — instead of throwing exceptions when e.g. trying to set `service_container` to something that isn't `$this`… (which is technically possible right now, but the operation doesn't remotely make sense)

#### API changes
Per (3) above, this PR is backwards-compatible.  However, for the sake of full disclosure, users may experience the following super-micro changes compared to HEAD:

1. The following method no longer exists in a dumped Container, because it is no longer a registered service:

  ```php
      protected function getServiceContainerService()
      {
          throw new RuntimeException('You have requested a synthetic service ("service_container"). The DIC does not know how to construct this service.');
      }
  ```
  But given the exception, you weren't able to call it anyway.
1. The order/position of `service_container` in the array returned by `Container::getServiceIds()` may be different.

  But that array has no particular order to begin with.

  (Only the component's own unit tests are expecting an identical result at times, which is why I added the hard-coded ID via `$id[]` last, instead of initializing it first with `$id` already.)
1. `$container->set('service_container', $not_the_container);` no longer works.

Commits
-------

440322e Fixed self-reference in 'service_container' service breaks garbage collection (and clone).
fix some docblocks
built-in server: exit when docroot does not exist

When the server:run command is run with an invalid document root
directory (for example, when being in the app directory and not
changing the document root to ../web/), the command crashes on Windows
with a 267 exit code. On Linux, the server starts but just publishes
internal server errors.
[Translation] made XliffFileDumper support CDATA sections.
minor #11483 fix some docblocks (xabbuh)

This PR was merged into the 2.3 branch.

Discussion
----------

fix some docblocks

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

Commits
-------

1775da5 fix some docblocks
[Validator] refs #11489 add some translations in french
fix axes handling in Crawler::filterXPath()

Due to some limitations in the relativize() method, it was not
possible to use XPath axes other than descendant or descendant-or-self
in the filterXPath() method of the Crawler class. This commit adds
support for the ancestor, ancestor-or-self, attribute, child,
following, following-sibling, parent, preceding, preceding-sibling and
self axes.
fixed whitespace in Twig form template