SSI support
[HttpFoundation] ResponseHeaderBag::clearCookie now accepts secure/httpOnly
Add missing dot at the end of an exception message
Added line feed to container alias description (text descriptor)
New service to simplify password encoding
[Form] Check if IntlDateFormatter constructor returned a valid object before using it
remove the scope from the output of the container:debug command
Added support for encoding and decoding namespaced xml (xmlns)
[Process] Use correct test for empty string in UnixPipes
server:run command: provide more error information

The server:run command didn't provide many information when the executed
command exited unexpectedly. Now, the process' exit code is passed through
and an error message is displayed.
updated CHANGELOG for 2.3.18
update CONTRIBUTORS for 2.3.18
updated VERSION for 2.3.18
[2.5][Form] solved dependency to ValidatorInterface, fix #11036
bug #11350 [2.5][Form] solved dependency to ValidatorInterface, fix #11036 (Sebastian Blum)

This PR was squashed before being merged into the 2.6-dev branch (closes #11350).

Discussion
----------

[2.5][Form] solved dependency to ValidatorInterface, fix #11036

| Q             | A
| ------------- | ---
| Bug fix?      | [yes]
| New feature?  | [no]
| BC breaks?    | [no]
| Deprecations? | [no]
| Tests pass?   | [yes]
| Fixed tickets | #11036, #11345
| License       | MIT
| Doc PR        |

Since Symfony 2.5

The problem was that the form component has a hardcoded depencency to the deprecated validator component (api Version 2.4)
The pull request fixes the dependency to the validator component and supports now both implementations, apiVersion 2.5 and apiVersion 2.4 of the validator component.

@Symfony Core Members
please review the changes https://github.com/sebastianblum/symfony/blob/0a1e9c208f8730219bebf89f6696b246a0c88da7/src/Symfony/Component/Form/Extension/Validator/ValidatorExtension.php
I'm not sure if it was the right solution

Commits
-------

ab765c9 [2.5][Form] solved dependency to ValidatorInterface, fix #11036
[2.5][Form] solved dependency to ValidatorInterface, fix #11036
bug #11350 [2.5][Form] solved dependency to ValidatorInterface, fix #11036 (Sebastian Blum)

This PR was submitted for the master branch but it was merged into the 2.5 branch instead (closes #11350).

Discussion
----------

[2.5][Form] solved dependency to ValidatorInterface, fix #11036

| Q             | A
| ------------- | ---
| Bug fix?      | [yes]
| New feature?  | [no]
| BC breaks?    | [no]
| Deprecations? | [no]
| Tests pass?   | [yes]
| Fixed tickets | #11036, #11345
| License       | MIT
| Doc PR        |

Since Symfony 2.5

The problem was that the form component has a hardcoded depencency to the deprecated validator component (api Version 2.4)
The pull request fixes the dependency to the validator component and supports now both implementations, apiVersion 2.5 and apiVersion 2.4 of the validator component.

@Symfony Core Members
please review the changes https://github.com/sebastianblum/symfony/blob/0a1e9c208f8730219bebf89f6696b246a0c88da7/src/Symfony/Component/Form/Extension/Validator/ValidatorExtension.php
I'm not sure if it was the right solution

Commits
-------

705d67b [2.5][Form] solved dependency to ValidatorInterface, fix #11036
updated CHANGELOG for 2.4.8
updated VERSION for 2.4.8
updated CHANGELOG for 2.5.2