[Routing] added working test case for issue #5135
added content length header to BinaryFileResponse
bug #9412 [HttpFoundation] added content length header to BinaryFileResponse (kbond)

This PR was submitted for the master branch but it was merged into the 2.2 branch instead (closes #9412).

Discussion
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[HttpFoundation] added content length header to BinaryFileResponse

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #9256, #7684
| License       | MIT
| Doc PR        | n/a

Commits
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e75a556 added content length header to BinaryFileResponse
update CONTRIBUTORS
[FrameworkBundle] fix routing container parameter exception message

also improve regex performance and fix implementation-specific written tests and typo
minor #9370 [FrameworkBundle] add test for #5135 and simplify routing container parameter resolution (Tobion)

This PR was merged into the 2.2 branch.

Discussion
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[FrameworkBundle] add test for #5135 and simplify routing container parameter resolution

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Fixes   | #5135
| Tests pass?   | yes
| license?      | MIT

1. [FrameworkBundle] added working test case for issue #5135
2. [FrameworkBundle] fix routing container parameter exception message which did not really make sense and improve regex performance

Commits
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719e037 [FrameworkBundle] fix routing container parameter exception message
8513ac9 [Routing] added working test case for issue #5135
[DependencyInjection] fixed YamlDumper did not make services private.
bug #9431 [DependencyInjection] fixed YamlDumper did not make services private. (realityking)

This PR was merged into the 2.2 branch.

Discussion
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[DependencyInjection] fixed YamlDumper did not make services private.

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

The YamlDumper class (unlike the XmlDumper) currently doesn't make services private. This pull request fixes this.

Commits
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e8c2082 [DependencyInjection] fixed YamlDumper did not make services private.
slovenian translations fixed
minor #9436 Slovenian translations fixed for Symfony 2.2 (peterkokot)

This PR was merged into the 2.2 branch.

Discussion
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Slovenian translations fixed for Symfony 2.2

Some fixes for Slovenian translations.

Commits
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0819130 slovenian translations fixed