remove realpath call

I'm trying to create an executable phar archive from a Symfony application, but when I run the phar, it fails to find any commands because of this php bug/feature:

https://bugs.php.net/bug.php?id=52769

After this change, my archive works just like a normal app/console call
merged branch Burgov/patch-2 (PR #6263)

This PR was merged into the 2.0 branch.

Commits
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e6bb156 remove realpath call

Discussion
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[HttpKernel] remove realpath call

I'm trying to create an executable phar archive from a Symfony application, but when I run the phar, it fails to find any commands because of this php bug/feature:

https://bugs.php.net/bug.php?id=52769

After this change, my archive works just like a normal app/console call
[FrameworkBundle] used the new method for trusted proxies
checked for a potentially missing key

The 'function' key isn't always available in the trace. This was
causing me a notice.
merged branch bamarni/patch-14 (PR #6273)

This PR was submitted for the master branch but it was merged into the 2.0 branch instead (closes #6273).

Commits
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9273b62 [HttpKernel] checked for a potentially missing key

Discussion
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[HttpKernel] checked for a potentially missing key
[FrameworkBundle] Added a check on file mime type for CodeHelper::fileExcerpt()
[FrameworkBundle] Added tests for trusted_proxies configuration.
Added comment
Merge pull request #1 from pylebecq/2.0

[FrameworkBundle] Added tests for trusted_proxies configuration.
merged branch francisbesset/check_mime_type (PR #6345)

This PR was merged into the 2.0 branch.

Commits
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d3f5f3a Added comment
773d818 [FrameworkBundle] Added a check on file mime type for CodeHelper::fileExcerpt()

Discussion
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[FrameworkBundle] Added a check on file mime type for CodeHelper::fileExcerpt()

Fixed a bug on `CodeHelper::fileExcerpt()`.

I add a check on the file mime type because I use a phar of phpunit and when a exception throwed in a test, Symfony build a page with the stack trace of the exception.

The phpunit.phar path is in the stack trace and Symfony call `highlight_file()` function on this file path.
`highlight_file()` cannot parse the phar file and warnings are displayed.

This PR add a check on the file mime type.
**This PR can be applied on 2.0, 2.1 and master branches.**

Bug fix: yes
Feature addition: no
Backwards compatibility break: no
Symfony2 tests pass: yes (The broken test seems to be unrelated to this change)
Fixes the following tickets: -
License of the code: MIT
[Translation] added Metadata to MessageCatalogue
[Translation] fixed name
[Translation] created a new interface to avoid breaking BC
[Translation] removed some code that is not done anywhere else in Symfony
[Translation] fixed CS in unit tests
[Translation] changed the MetadataAwareInterface method signatures
[Session] Fixed a bug with the TestListener

When the session is not started, the test listener would still save the
session causing the session data to be emptied.
[Session] Added exception to save method

A RuntimeException is thrown if there is an attempt to save the session
without it being started, or if it has already been closed.
merged branch baldurrensch/testlistener_fix (PR #6362)

This PR was merged into the 2.1 branch.

Commits
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098b593 [Session] Added exception to save method
6b9ee87 [Session] Fixed a bug with the TestListener

Discussion
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[Session] Fixed bug with TestListener

Fixed a bug where an unstarted mock session would be emptied with a save. Here are the steps to reproduce:

Use the test client from Symfony\Bundle\FrameworkBundle\Test\WebTestCase::createClient(), and add something to its session. (I actually had it authenticate against a firewall).
Take the cookies of this first test client and add them to a second test client
Have the second test client request a URL that results in a 404
Since the 404 does not need to start the session, hence when save is called (automatically), the mock session is overwritten with an empty array. This does not happen with the other session handlers.
The added unit test in this PR shows this problem. If this PR gets accepted, will it also get merged into the 2.1.x-dev branch?

Bug fix: yes
Feature addition: no
Backwards compatibility break: no
Symfony2 tests pass: yes (The broken test seems to be unrelated to this change)
Fixes the following tickets: -
Todo: -
License of the code: MIT
Documentation PR: -

This is a follow up PR since my original one (https://github.com/symfony/symfony/pull/6342) was against the wrong upstream branch.
merged branch fabpot/translation-metadata (PR #6349)

This PR was merged into the master branch.

Commits
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320fb6c [Translation] changed the MetadataAwareInterface method signatures
11ff433 [Translation] fixed CS in unit tests
c40db35 [Translation] removed some code that is not done anywhere else in Symfony
63719a0 [Translation] created a new interface to avoid breaking BC
23e9e65 [Translation] fixed name
5607732 [Translation] added Metadata to MessageCatalogue

Discussion
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[MessageCatalogue] Add Metadata to MessageCatalogue

rework of #4399

For improving the Gettext tools (PO, MO File Loader/Dumper) we need at least storage for their meta data.

This patch allows for issues below to store and process ie Po Header, Po Header Pluralisation rule.

Open
- [[WIP]: Allow Drupal to use Translate component](https://github.com/symfony/symfony/pull/4249)
- [[2.1][Translator] Symfony translation process & gettext](https://github.com/symfony/symfony/issues/4245)

Closed:
- [[Translation] Po/MoFileLoader parse plurization rules](https://github.com/symfony/symfony/pull/3023)

It has 1 TODO regarding addCatalogue: it now just override old values with new.