add allow_extra_fields option
[SecurityBundle] added acl:set command
Allow overloading ContextListener::refreshUser()
[HttpFoundation] use different approach for duplicate keys in postgres, fix merge for sqlsrv and oracle
updated CHANGELOG for 2.3.16
update CONTRIBUTORS for 2.3.16
updated VERSION for 2.3.16
updated CHANGELOG for 2.4.6
updated VERSION for 2.4.6
updated CHANGELOG for 2.5.0
updated VERSION for 2.5.0
Fix a parameter name in a test
bumped Symfony version to 2.3.17
bumped Symfony version to 2.4.7
bumped Symfony version to 2.5.1
[Debug] fix wrong case mismatch exception
minor #11026 [Validator] Fix a parameter name in a test (elnur)

This PR was merged into the 2.3 branch.

Discussion
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[Validator] Fix a parameter name in a test

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | none
| License       | MIT
| Doc PR        | not required

Commits
-------

069e925 Fix a parameter name in a test
Remove undefined variable $e
bug #11041 Remove undefined variable $e (skydiablo)

This PR was submitted for the master branch but it was merged into the 2.3 branch instead (closes #11041).

Discussion
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Remove undefined variable $e

This PR was submitted on the symfony/DependencyInjection read-only repository and moved automatically to the main Symfony repository (closes symfony/DependencyInjection#6).

Commits
-------

637c6e1 Remove undefined variable $e
[Debug] enhanced error messages for uncaught exceptions