Add This field is missing RU translation

<source>This field is missing.</source>
Have no translation. Not exists in EN version too. Just forgotten? 
Symfony\Component\Validator\Constraints\Collection()
public $missingFieldsMessage = 'This field is missing.';
merged branch fabpot/moved_validator_4 (PR #7784)

This PR was merged into the 2.1 branch.

Discussion
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Add This field is missing RU translation

This PR was submitted on the symfony/Validator read-only repository and moved automatically to the main Symfony repository (closes symfony/Validator#4).

<source>This field is missing.</source>
Have no translation. Not exists in EN version too. Just forgot? 
Symfony\Component\Validator\Constraints\Collection()
public $missingFieldsMessage = 'This field is missing.';

Commits
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97c4291 Add This field is missing RU translation
Rename misprint property (from warmer to finder)
merged branch alexpods/patch-1 (PR #7837)

This PR was submitted for the master branch but it was merged into the 2.1 branch instead (closes #7837).

Discussion
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Rename misprint property (from warmer to finder)

Commits
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a1f5bd5 Rename misprint property (from warmer to finder)
[Process] Fix #5594 : `termsig` must be used instead of `stopsig` in exceptions when a process is signaled
[Filesystem] copy() is not working when open_basedir is set

More details: https://bugs.php.net/bug.php?id=64634
merged branch romainneutron/termsig (PR #7865)

This PR was merged into the 2.1 branch.

Discussion
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[Process] Fix #5594 : `termsig` must be used instead of `stopsig` in exceptions when a process is signaled

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #5594
| License       | MIT

When a process is signaled, an exception is thrown saying `The process has been signaled with signal "0".`. This is wrong because "0" is not a signal.

This is actually a bug in `Process` because we retrieve the `stopsig` property of the process status whereas we should retrieve the `termsig`.

`stopsig` should be retrieved in case the process has been stopped, and `termsig` when it has been signaled, see [PHP documentation](http://www.php.net/manual/en/function.proc-get-status.php).

Commits
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8757ad4 [Process] Fix #5594 : `termsig` must be used instead of `stopsig` in exceptions when a process is signaled
[BrowserKit] fixed BC break done recently
merged branch fabpot/cookies (PR #7879)

This PR was merged into the 2.1 branch.

Discussion
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[BrowserKit] fixed BC break done recently

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

This PR tries to avoid a BC break that was introduced recently in the management of cookies (see #7738).

see fabpot/Silex#684

Commits
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25b8b84 [BrowserKit] fixed BC break done recently
Merge branch '2.1' into 2.2

* 2.1:
  [BrowserKit] fixed BC break done recently
  [Process] Fix #5594 : `termsig` must be used instead of `stopsig` in exceptions when a process is signaled
  Rename misprint property (from warmer to finder)
  Add This field is missing RU translation

Conflicts:
	src/Symfony/Component/Process/Process.php
	src/Symfony/Component/Validator/Resources/translations/validators.ru.xlf
[Translation] fixed a unit test
Fix getPort() returning 80 instead of 443 when X-FORWARDED-PROTO is set to https
merged branch pst/master (PR #7871)

This PR was submitted for the master branch but it was merged into the 2.1 branch instead (closes #7871).

Discussion
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Fix getPort() returning 80 instead of 443 when X-FORWARDED-PROTO is set to https

[HttpFoundation] fixed something

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #7870
| License       | MIT
| Doc PR        |

Ensure that the getPort() method returns port 443 as default when
X-FORWARDED-PROTO is set to https. Currently it would return port 80
if X-FORWARDED-PROTO was set to https and X-FORWARDED-PORT was not
set by the trusted proxy.

Commits
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8554af3 Fix getPort() returning 80 instead of 443 when X-FORWARDED-PROTO is set to https
Merge branch '2.1' into 2.2

* 2.1:
  Fix getPort() returning 80 instead of 443 when X-FORWARDED-PROTO is set to https
merged branch stloyd/patch-3 (PR #7869)

This PR was merged into the 2.1 branch.

Discussion
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[Filesystem] copy() is not working when open_basedir is set

More details: https://bugs.php.net/bug.php?id=64634

Commits
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10dea94 [Filesystem] copy() is not working when open_basedir is set
use while loop for iterating

The other method limits the number of results without taking the
constraints into account.

Fixes GH-7883
merged branch henrikbjorn/filesystem-limit (PR #7886)

This PR was submitted for the master branch but it was merged into the 2.1 branch instead (closes #7886).

Discussion
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[HttpKernel][Profile] Fixes #7883

Commits
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0172fc1 [HttpKernel][Profile] use while loop for iterating
remove validation related headers when needed
merged branch bamarni/issue-6977 (PR #7857)

This PR was submitted for the master branch but it was merged into the 2.1 branch instead (closes #7857).

Discussion
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[HttpCache] remove validation related headers when needed

| Q             | A
| ------------- | ---
| Bug fix?      | [yes]
| New feature?  | [no]
| BC breaks?    | [yes]
| Deprecations? | [no]
| Tests pass?   | [yes]
| Fixed tickets | [#6977]
| License       | MIT

Fixes #6977 by removing validation related headers when there is at least one embedded response.

I've added an embedded response counter because the current check was wrong I think, it was checking count($this->ttls) which isn't updated for validateable responses.

And for the BC break, looking at the interface PHPDoc description, it supposes add() method should only be applied on esi responses and update() takes the master one at the end, what do you think?

Commits
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bb80139 [HttpCache] remove validation related headers when needed
[Swiftmailer] bumped allowed versions