feature #11869 #11652 [HttpKernel] Remove unused method Kernel::isClassInActiveBundle (hacfi)

This PR was squashed before being merged into the 2.6-dev branch (closes #11869).

Discussion
----------

#11652 [HttpKernel] Remove unused method Kernel::isClassInActiveBundle

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | no
| BC breaks?    | yes, deprecation targets 3.0
| Deprecations? | yes
| Tests pass?   | yes
| Fixed tickets | #11652
| License       | MIT
| Doc PR        | - (Not mentioned in the docs)

Commits
-------

a777fd7 #11652 [HttpKernel] Remove unused method Kernel::isClassInActiveBundle
new helper commands for PHP's built-in server
[Intl] Added "internal" tag to all classes under Symfony\Component\Intl\ResourceBundle

We didn't have this tag yet when this component was first written. The code in that
namespace is only used for resource bundle generation and was never meant for public
use.
minor #11891 [Intl] Added "internal" tag to all classes under Symfony\Component\Intl\ResourceBundle (webmozart)

This PR was merged into the 2.3 branch.

Discussion
----------

[Intl] Added "internal" tag to all classes under Symfony\Component\Intl\ResourceBundle

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

We didn't have this tag yet when this component was first written. The code in that
namespace is only used for resource bundle generation and was never meant for public
use.

We need to include in the update notes that users should check for usage of these classes.

Commits
-------

7fd5e8b [Intl] Added "internal" tag to all classes under Symfony\Component\Intl\ResourceBundle
[FrameworkBundle] Remove invalid markup
bug #11897 [FrameworkBundle] Remove invalid markup (flack)

This PR was submitted for the 2.5 branch but it was merged into the 2.3 branch instead (closes #11897).

Discussion
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[FrameworkBundle] Remove invalid markup

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #11896
| License       | MIT
| Doc PR        | n/a

Commits
-------

1fe8e31 [FrameworkBundle] Remove invalid markup
bug #11374 [DI] Added safeguards against invalid config in the YamlFileLoader (stof)

This PR was merged into the 2.3 branch.

Discussion
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[DI] Added safeguards against invalid config in the YamlFileLoader

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #11333
| License       | MIT
| Doc PR        | n/a

Exceptions explaining the mistake are better than fatal errors or weird notices appearing when trying to deal with such invalid data.

The XML file loader is not affected by this because the data are validated with the XSD before being processed

Commits
-------

5183501 [DI] Added safeguards against invalid config in the YamlFileLoader
feature #11549 [Bundle][FrameworkBundle] make the stopwatch service always available (xabbuh)

This PR was merged into the 2.6-dev branch.

Discussion
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[Bundle][FrameworkBundle] make the stopwatch service always available

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | yes
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #11347
| License       | MIT
| Doc PR        |

Previously, one had to be careful to check if the ``debug.stopwatch`` service was available before using it. Otherwise, the application would break in the prod environment.

Commits
-------

ffc4090 make the stopwatch service always available
minor #11822 [Security] Use hash_equals for constant-time string comparison (again) (dunglas)

This PR was merged into the 2.3 branch.

Discussion
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[Security] Use hash_equals for constant-time string comparison (again)

| 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

Use the `hash_equals` function (introduced in PHP 5.6) for timing attack safe string comparison when available.

Add in the DocBlock that length will leak (https://github.com/symfony/symfony/pull/11797#issuecomment-53990712).

Commits
-------

3071557 [Security] Add more tests for StringUtils::equals
03bd74b [Security] Use hash_equals for constant-time string comparison
[SwiftmailerBridge] Bump allowed versions of swiftmailer

Current version of Swiftmailer is 5.2.1, while (previously to this commit)
the version installed by composer was 5.0.3.

This is rather important, since 5.2.1 closes a security issue that 5.0.3 is
vulnarable to (https://github.com/swiftmailer/swiftmailer/issues/494).
Use separated function to resolve command and related arguments
bug #11497 Use separated function to resolve command and related arguments (JJK801)

This PR was submitted for the master branch but it was merged into the 2.3 branch instead (closes #11497).

Discussion
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Use separated function to resolve command and related arguments

Hi,

This PR split command and related arguments resolution into two distinct functions.

It will help to solve the HHVM issue sensiolabs/SensioDistributionBundle#150 .

Thanks,

Jérémy

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

Commits
-------

ee75af0 Use separated function to resolve command and related arguments
[Intl] Removed non-working $fallback argument from ArrayAccessibleResourceBundle
[OptionsResolver] Added a light-weight, low-level API for basic option resolving
bug #11905 [Intl] Removed non-working $fallback argument from ArrayAccessibleResourceBundle (webmozart)

This PR was merged into the 2.3 branch.

Discussion
----------

[Intl] Removed non-working $fallback argument from ArrayAccessibleResourceBundle

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

The code in question didn't actually work. This was extracted from #9206.

Commits
-------

5feda5e [Intl] Removed non-working $fallback argument from ArrayAccessibleResourceBundle
[Intl] Updated icu.ini up to ICU 53
[Intl] Fixed a few bugs in TextBundleWriter
[Intl] Added exception handler to command line scripts
minor #11914 [Intl] Added exception handler to command line scripts (webmozart)

This PR was merged into the 2.3 branch.

Discussion
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[Intl] Added exception handler to command line scripts

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

Extracted from #9206.

Commits
-------

9052efc [Intl] Added exception handler to command line scripts
minor #11913 [Intl] Updated icu.ini up to ICU 53 (webmozart)

This PR was merged into the 2.3 branch.

Discussion
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[Intl] Updated icu.ini up to ICU 53

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

Extracted from #9206.

Commits
-------

260e2fe [Intl] Updated icu.ini up to ICU 53