[Form] Moved auto_initialize option to the BaseType
merged branch jakzal/2.3-form-button-fix (PR #8349)

This PR was squashed before being merged into the 2.3 branch (closes #8349).

Discussion
----------

[Form] Moved auto_initialize option to the BaseType

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #8162
| License       | MIT
| Doc PR        | -

I'm not fully confident in this change, so let someone review it before mergin please. My thinking was - since "auto_initialized" option is always passed to a form factory, it should be required by the base type.

Commits
-------

6ed0fdf [Form] Moved auto_initialize option to the BaseType
[FrameworkBundle] made code more generic
Fix internal sub-request creation

Fixes the creation of internal sub-request in case of disabled trusted
client-ip header
merged branch lazyhammer/fix-inline-fragment (PR #7893)

This PR was submitted for the master branch but it was merged into the 2.3 branch instead (closes #7893).

Discussion
----------

[HttpKernel] Fix internal sub-request creation

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

Fixes the creation of internal sub-request in case of disabled trusted
client-ip header.

Commits
-------

85d5413 [HttpKernel] Fix internal sub-request creation
[TwigBridge] removed superflous ; when rendering form_enctype() (closes #8660)
merged branch fabpot/form_enctype-fix (PR #8731)

This PR was merged into the 2.3 branch.

Discussion
----------

form_enctype() fix (closes #8660)

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #8660
| License       | MIT
| Doc PR        | n/a

Commits
-------

572ba68 [TwigBridge] removed superflous ; when rendering form_enctype() (closes #8660)
[Process] Fix CS
[Process] Add failing test for #8739
[Process] Fix #8739
[Process] Avoid zombie process in case of unit tests failure
[Process] Add more precision to Process::stop timeout
merged branch shieldo/grammar_fix (PR #8745)

This PR was merged into the 2.2 branch.

Discussion
----------

Grammar fix

Commits
-------

d74eaf9 corrected English grammar (s/does not exists/does not exist)
merged branch romainneutron/process-callbacks-2.2 (PR #8741)

This PR was merged into the 2.2 branch.

Discussion
----------

[Process][2.2] Fix #8739

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #8739
| License       | MIT

This adds a fix to #8739. Whenever a call is done to to any non-blocking methods (`Process::isRunning`, `Process::isStopped`, `Process::isTerminated`, `Process::getStatus`, `Process::getPid`...), buffers are read, and callback executed.

Such code will now work :

```
$process->start(function ($type, $data) {
    echo $data;
});

while ($process->isRunning()) {
    // some stuff
    // callback is executed
}
```

Commits
-------

fa769a2 [Process] Add more precision to Process::stop timeout
57d4159 [Process] Avoid zombie process in case of unit tests failure
3ef517b [Process] Fix #8739
7716fb2 [Process] Add failing test for #8739
bff6f3c [Process] Fix CS
Merge branch '2.2' into 2.3

* 2.2:
  corrected English grammar (s/does not exists/does not exist)
  [Process] Add more precision to Process::stop timeout
  [Process] Avoid zombie process in case of unit tests failure
  [Process] Fix #8739
  [Process] Add failing test for #8739
  [Process] Fix CS
  Fixed documentation grammar for AuthenticationManagerInterface::authenticate()
  [Validator] fixed the wrong isAbstract() check against the class (fixed #8589)
  [TwigBridge] Prevent code extension to display warning
  Use strstr instead of strpos

Conflicts:
	src/Symfony/Component/Finder/Shell/Command.php
	src/Symfony/Component/Process/Process.php
[Process] Fix #8742 : Signal-terminated processes are not successful
[Process] Fix #8746 : slowness added in unit tests since #8741
[Process] Revert change
merged branch romainneutron/slowness (PR #8749)

This PR was merged into the 2.2 branch.

Discussion
----------

[Process] Fix #8746 : slowness added in unit tests since #8741

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #8746
| License       | MIT

Commits
-------

8c4bae3 [Process] Revert change
8d9c7c6 [Process] Fix #8746 : slowness added in unit tests since #8741
Merge branch '2.2' into 2.3

* 2.2:
  [Process] Revert change
  [Process] Fix #8746 : slowness added in unit tests since #8741