Merge remote-tracking branch 'origin/2.4' into 2.4
Merge branch '2.3' into 2.4
Merge branch '2.4'
Further tweaks to the PHPUnit configuration description
Fixes after review
Update forms.rst

Accessing form values via `vars` property instead of getter. Updated PHP templating examples.
Update forms.rst

Accessing form values via `vars` property instead of getter. Updated PHP templating examples.
merge
Fixed vars as object property, not array
add empty_data option where required option is used
improve explanation of code block for bundle removal and fix typo
add missing code-block directive
[Validation] Add "hasser" support
create configuration cookbook with ways of handling paramters in Configurator class
add note when forbidding access to anonymous users on custom authentication provider
[Contributing] Clarify the rebase operation

I just mentioned the fact that `push -f` is usually required when rebasing and explicit that the "2.2 when bugfixing" is a follow up on the previous example (Not necessarily explicit at first).
Add "versionadded" directive for 2.5
[Contributing] Fix single vs double backtick issues
[Contributing] Add PSR-1 and 2 links
[Contributing] Replace mentions of 2.2 for 2.3

As per WouterJ request: https://github.com/symfony/symfony-docs/pull/3421#issuecomment-31585092