Fix potential DoS when parsing HOST
Test examples from Drupal SA-CORE-2014-003
fix parsing of Authorization header
[HttpFoundation] added some missing tests
[FrameworkBundle][Translator] Validate locales.
Add tests and more assertions
Forced all fragment uris to be signed, even for ESI
[WebProfiler] replaced the import/export feature from the web interface to a CLI tool
fixing yaml indentation
minor #11825 fixing yaml indentation (cordoval)

This PR was submitted for the master branch but it was merged into the 2.3 branch instead (closes #11825).

Discussion
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fixing yaml indentation

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

Commits
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3bba329 fixing yaml indentation
security #11828 n/a (nicolas-grekas, larowlan)

This PR was merged into the 2.3 branch.

Discussion
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n/a

n/a

Commits
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1ee96a8 Test examples from Drupal SA-CORE-2014-003
5506ee8 Fix potential DoS when parsing HOST
security #11829 n/a (damz, fabpot)

This PR was merged into the 2.3 branch.

Discussion
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n/a

n/a

Commits
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3b4046e [HttpFoundation] added some missing tests
cefe237 fix parsing of Authorization header
security #11830 n/a (aitboudad, Jérémy Derussé)

This PR was merged into the 2.3 branch.

Discussion
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n/a

n/a

Commits
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9e1bc22 Add tests and more assertions
101a3b7 [FrameworkBundle][Translator] Validate locales.
security #11831 n/a (stof)

This PR was merged into the 2.3 branch.

Discussion
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n/a

n/a

Commits
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654b1f2 Forced all fragment uris to be signed, even for ESI
security #11832 n/a (fabpot)

This PR was merged into the 2.3 branch.

Discussion
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n/a

n/a

Commits
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f38536a [WebProfiler] replaced the import/export feature from the web interface to a CLI tool
[HttpKernel] fixed internal fragment handling
updated CHANGELOG for 2.3.19
update CONTRIBUTORS for 2.3.19
updated VERSION for 2.3.19
bumped Symfony version to 2.3.20