[Process] Fix process status in TTY mode

When running a process with TTY mode, status in automatically set to `terminated`
once it's started.

It's wrong for two reasons :
 - The status of the process is not yet terminated.
 - The exitcode value is never caught
minor #10411 [Process] Fix comparisons against process exitcode (romainneutron)

This PR was merged into the 2.3 branch.

Discussion
----------

[Process] Fix comparisons against process exitcode

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

Use identical comparison instead of equal. In case the exitcode has not been caught, `Process::isSuccessful` returns true instead of false. It should not happen, but it's much more clean like that.

Commits
-------

d66f63f [Process] Use assertSame instead of assertEquals to avoid comparison against `null`
bug #10412 [Process] Fix process status in TTY mode (romainneutron)

This PR was merged into the 2.3 branch.

Discussion
----------

[Process] Fix process status in TTY mode

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

When running a process with TTY mode, status in automatically set to `terminated`
once it's started.

It's wrong for two reasons :
 - The status of the process is not yet terminated.
 - The exitcode value is never caught

Commits
-------

51c70f8 [Process] Fix process status in TTY mode
feature #9918 [Form] Changed Form::getErrors() to return an iterator and added two optional parameters $deep and $flatten (webmozart)

This PR was merged into the 2.5-dev branch.

Discussion
----------

[Form] Changed Form::getErrors() to return an iterator and added two optional parameters $deep and $flatten

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | yes
| BC breaks?    | yes
| Deprecations? | yes
| Tests pass?   | yes
| Fixed tickets | #7205
| License       | MIT
| Doc PR        | -

See the changes in the UPGRADE files for more information.

Commits
-------

6b3fbb5 [Form] Changed the default value of $flatten in Form::getErrors() to true
a9268c4 [Form] Changed Form::getErrors() to return an iterator and added two optional parameters $deep and $flatten
feature #10414 [Validator] Checked the constraint class in constraint validators (webmozart)

This PR was merged into the 2.5-dev branch.

Discussion
----------

[Validator] Checked the constraint class in constraint validators

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

Commits
-------

df56c23 [Validator] Checked the constraint class in constraint validators
[Form] Removed "magic" from FormErrorIterator
[Process] Make process tests more accurate on exception messages
minor #10419 [2.3][Process] Make process tests more accurate on exception messages (romainneutron)

This PR was merged into the 2.3 branch.

Discussion
----------

[2.3][Process] Make process tests more accurate on exception messages

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

I need exception message to be checked more accurately in my upcoming PR about windows.
I decided to make a separated PR as the other one will probably take some time before being merged

Commits
-------

1b1768a [Process] Make process tests more accurate on exception messages
feature #10418 [Form] Removed "magic" from FormErrorIterator (webmozart)

This PR was merged into the 2.5-dev branch.

Discussion
----------

[Form] Removed "magic" from FormErrorIterator

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

Commits
-------

daac66e [Form] Removed "magic" from FormErrorIterator
[Process] Fix some unit tests that create the process object instead of delegate it to the implementation
[Process] Fix some unit tests that create the process object instead of delegate it to the implementation

This is the patch for version 2.4
minor #10421 [Process] Fix some unit tests that create the process object instead of delegate it to the implementation (romainneutron)

This PR was merged into the 2.3 branch.

Discussion
----------

[Process] Fix some unit tests that create the process object instead of delegate it to the implementation

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

This is a minor error ; creating the process must be delegated to the implementation

Commits
-------

227b85b [Process] Fix some unit tests that create the process object instead of delegate it to the implementation
[Process] Add Process::disableOutput and Process::enableOutput methods
Fixed data in pipe being truncated if not read before process termination
[Process] Fix #9160 : escaping an argument with a trailing backslash on windows fails
bug #10429 [2.3][Process] Fix #9160 : escaping an argument with a trailing backslash on windows fails (romainneutron)

This PR was merged into the 2.3 branch.

Discussion
----------

[2.3][Process] Fix #9160 : escaping an argument with a trailing backslash on windows fails

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #9160
| License       | MIT

Commits
-------

10e903a [Process] Fix #9160 : escaping an argument with a trailing backslash on windows fails
Merge branch '2.3' into 2.4

* 2.3:
  [Process] Fix #9160 : escaping an argument with a trailing backslash on windows fails
  [Process] Fix some unit tests that create the process object instead of delegate it to the implementation
  [Process] Make process tests more accurate on exception messages
  [Process] Fix process status in TTY mode
  [Process] Use assertSame instead of assertEquals to avoid comparison against `null`
  [HttpFoundation] added some unit tests
  10158 get vary multiple
  made Cookie stringification more robust
  [Yaml] fix for a HHVM bug
minor #10424 [2.4][Process] Fix some unit tests that create the process object instead of delegate it to the implementation (romainneutron)

This PR was merged into the 2.4 branch.

Discussion
----------

[2.4][Process] Fix some unit tests that create the process object instead of delegate it to the implementation

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

This follows #10421 in branch 2.4

Commits
-------

741a8c1 [Process] Fix some unit tests that create the process object instead of delegate it to the implementation
feature #10425 [Process] Add Process::disableOutput and Process::enableOutput methods (romainneutron)

This PR was merged into the 2.5-dev branch.

Discussion
----------

[Process] Add Process::disableOutput and Process::enableOutput methods

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | yes
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #9007
| License       | MIT
| Doc PR        | https://github.com/symfony/symfony-docs/pull/3664

This is another implementation for #9007 that allows to disable the output/error-output storage in a Process in order to avoid using memory.
This is particularly useful when the process outputs large data and it's not read.

Commits
-------

a891e14 [Process] Add Process::disableOutput and Process::enableOutput methods
bug #10153 [Process] Fixed data in pipe being truncated if not read before process termination (astephens25)

This PR was merged into the 2.3 branch.

Discussion
----------

[Process] Fixed data in pipe being truncated if not read before process termination

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #9409
| License       | MIT
| Doc PR        | N/A

This is a repeat of the botched pull request #9630.

Commits
-------

7e51913 Fixed data in pipe being truncated if not read before process termination