remove an unneeded check

It is already checked in the `isEnabled()` method if the current PHP
build is HHVM and the `server:run` command is never enabled then.
Thus, it's not needed to check for HHVM on every command execution.
backport #12489
compare version using PHP_VERSION_ID

This continues the work started in #12497 on the `2.3` branch.
Rename Symfony2 to Symfony
fix data type in docblock
Fix initialized() with aliased services
bug #12570 Fix initialized() with aliased services (Daniel Wehner)

This PR was submitted for the master branch but it was merged into the 2.3 branch instead (closes #12570).

Discussion
----------

Fix initialized() with aliased services

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #12569
| License       | MIT
| Doc PR        |

Commits
-------

a18b6d1 Fix initialized() with aliased services
Upgrade information for the Translation component regarding the new LoggingTranslator class.
[RFC] [DebugBundle] [HttpKernel] Avoid using container as dependency for DumpListener
minor #12584 [RFC] [DebugBundle] [HttpKernel] Avoid using container as dependency for DumpListener (jeromemacias)

This PR was squashed before being merged into the 2.6 branch (closes #12584).

Discussion
----------

[RFC] [DebugBundle] [HttpKernel] Avoid using container as dependency for DumpListener

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

Usage of the `container` service as dependency avoid using the listener outside of a Symfony project.

I don't know if the lazy loading of the dumper service is really required. We should only use the `DebugBundle` in `dev` environment.
If it break performance, maybe we can consider using the `lazy="true"` parameter in services definition.

I currently working on a Silex [`DebugServiceProvider`](https://github.com/jeromemacias/Silex-Debug) which use the `DebugBundle` to avoid duplicating the dump profiler view (like it's done by the `WebProfilerServiceProvider`).
Those modifications are required by the provider to be usable.

Commits
-------

680fe7a [RFC] [DebugBundle] [HttpKernel] Avoid using container as dependency for DumpListener
minor #12566 [Security][Http] fix data type in docblock (xabbuh)

This PR was merged into the 2.6 branch.

Discussion
----------

[Security][Http] fix data type in docblock

| Q             | A
| ------------- | ---
| Fixed tickets | #12564
| License       | MIT

Commits
-------

1c6f5a1 fix data type in docblock
[Validator] make DateTime objects represented as strings in the violation message.
bug #12437 [2.6] [Validator] make DateTime objects represented as strings in the violation message (hhamon)

This PR was submitted for the master branch but it was merged into the 2.6 branch instead (closes #12437).

Discussion
----------

[2.6] [Validator] make DateTime objects represented as strings in the violation message

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

Commits
-------

b753218 [Validator] make DateTime objects represented as strings in the violation message.
minor #12579 [Translation] [2.6] Upgrade information for LoggingTranslator (derrabus)

This PR was merged into the 2.6 branch.

Discussion
----------

[Translation] [2.6] Upgrade information for LoggingTranslator

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | none
| License       | MIT
| Doc PR        | none

When upgrading a Symfony 2.5 project to the 2.6 branch, I noticed that the `@translator` service was changed. In the affected project, we've had a service that depends on the `@translator` service and uses a type hint to ensure that a `Translator` instance is passed to the constructor. With the introduction of the `LoggingTranslator` class (PR #10887), this type hint now fails.

I have added a small note to ` UPGRADE-2.6.md` in case more people stumble across this changed behavior.

Commits
-------

cd55a81 Upgrade information for the Translation component regarding the new LoggingTranslator class.
minor #12565 Rename Symfony2 to Symfony (romainneutron)

This PR was merged into the 2.3 branch.

Discussion
----------

Rename Symfony2 to Symfony

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

Replaces #12563

Commits
-------

0a76b7e Rename Symfony2 to Symfony
bug #12550 [FrameworkBundle] backport #12489 (xabbuh)

This PR was merged into the 2.3 branch.

Discussion
----------

[FrameworkBundle] backport #12489

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

Commits
-------

556eff1 backport #12489
minor #12551 remove an unneeded check (xabbuh)

This PR was merged into the 2.5 branch.

Discussion
----------

remove an unneeded check

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

It is already checked in the `isEnabled()` method if the current PHP
build is HHVM and the `server:run` command is never enabled then.
Thus, it's not needed to check for HHVM on every command execution.

Commits
-------

2035fea remove an unneeded check
[Debug] fix error message on double exception
bug #12553 [Debug] fix error message on double exception (nicolas-grekas)

This PR was submitted for the 2.6 branch but it was merged into the 2.3 branch instead (closes #12553).

Discussion
----------

[Debug] fix error message on double exception

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

Commits
-------

1ed7606 [Debug] fix error message on double exception
minor #12554 compare version using PHP_VERSION_ID (xabbuh)

This PR was merged into the 2.5 branch.

Discussion
----------

compare version using PHP_VERSION_ID

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

This continues the work started in #12497 on the `2.3` branch.

Commits
-------

d2f846b compare version using PHP_VERSION_ID