Add check to Store::unlock to ensure file exists

Fix indentation and shorten code
merged branch jonathaningram/issue_5375 (PR #5376)

This PR was merged into the 2.0 branch.

Commits
-------

a094f7e Add check to Store::unlock to ensure file exists

Discussion
----------

[2.0] [HttpKernel] Add check to Store::unlock to ensure file exists

Bug fix: yes
Feature addition: no
Backwards compatibility break: no
Symfony2 tests pass: yes

I was seeing this error in my logs when using an `AppCache`:

```
Error 2: /var/www/beta.example.com/shared/vendor/symfony/symfony/src/Symfony/Component/HttpKernel/HttpCache/Store.php line 92: unlink(/var/www/beta.example.com/releases/20120827020525/app/cache/beta/http_cache/md/c2/88/66a911b5266a57bdd55131a47895b8861dfd.lck): No such file or directory
```

It was only occurring when the `http_cache` file was being primed (i.e. first load).

I've added a simple check to ensure that the file is a valid file before trying to unlink. I also added a missing `@return` docblock. Note: I've chosen to return `false` if the file does not exist as this seems to be the behaviour of the `purge` method.

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by jonathaningram at 2012-08-29T06:46:52Z

@henrikbjorn done and rebased. Thanks.

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by jonathaningram at 2012-09-17T22:38:47Z

@henrikbjorn any news on this one? It's currently not possible to use the HTTP Cache without the first request failing.

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by jonathaningram at 2012-09-25T01:28:38Z

ping @fabpot sorry to keep pushing this, but any chance you could take a look at this?
[HttpFoundation] Fix name sanitization after perfoming move
merged branch helios-ag/patch (PR #5496)

This PR was squashed before being merged into the 2.0 branch (closes #5496).

Commits
-------

9872d26 [HttpFoundation] Fix name sanitization after perfoming move

Discussion
----------

[HttpFoundation] Fix name sanitization after perfoming move

Bug fix: yes
Feature addition: no
Backwards compatibility break: no
Symfony2 tests pass: yes
Fixes the following tickets: #2577
License of the code: MIT

Further work on #2577, fixes name sanitization, after moving file name with new name with non latin characters in the beginning.

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by stloyd at 2012-09-12T09:52:05Z

You must revert chmod changes.

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by helios-ag at 2012-09-12T14:30:36Z

@stloyd fixed

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by stof at 2012-10-13T21:12:43Z

@fabpot what is the status of this PR ?
The exception message should say which field is not mapped
merged branch mvrhov/patch-2 (PR #5857)

This PR was merged into the 2.0 branch.

Commits
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6b42c8c The exception message should say which field is not mapped

Discussion
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The exception message should tell which field is not mapped
shows correct class name InputOption in error message
merged branch pgodel/bugfix/InputOption (PR #5905)

This PR was merged into the 2.0 branch.

Commits
-------

762649f shows correct class name InputOption in error message

Discussion
----------

[Console] shows correct class name InputOption in error message

Bug fix: yes
Feature addition: no
Backwards compatibility break: no
Symfony2 tests pass: yes
License of the code: MIT

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by pborreli at 2012-11-04T03:59:58Z

:+1:
Show correct class name InputArgument in error message
merged branch pgodel/2.0 (PR #5914)

This PR was merged into the 2.0 branch.

Commits
-------

9aec4c8 Show correct class name InputArgument in error message

Discussion
----------

[Console] Show correct class name InputArgument in error message

Bug fix: yes
Feature addition: no
Backwards compatibility break: no
Symfony2 tests pass: yes
License of the code: MIT
[Form] Fixed NumberToLocalizedStringTransformer to accept both comma and dot as decimal separator, if possible
merged branch bschussek/issue2059 (PR #5941)

This PR was merged into the 2.0 branch.

Commits
-------

dc80385 [Form] Fixed NumberToLocalizedStringTransformer to accept both comma and dot as decimal separator, if possible

Discussion
----------

[Form] Fixed NumberToLocalizedStringTransformer to accept both comma and dot

Bug fix: yes
Feature addition: no
Backwards compatibility break: no
Symfony2 tests pass: yes
Fixes the following tickets: #2059
Todo: -
License of the code: MIT
Documentation PR: -

The behaviour after this is as follows:

* if "grouping" (thousands separators) is disabled (the default)
  * you may use comma and dot as decimal separator in all locales
* if "grouping" is enabled
  * you may use a comma as decimal separator in all locales where the thousands separator is not a comma (e.g. "de", "fr", but not "en")
  * you may use a dot as decimal separator in all locales where the thousands separator is not a dot (e.g. "en", "fr", but not "de")

If the form is displayed again, all numbers are displayed in your locale, regardless of which decimal separator you used for input.

**Example 1 (locale "fr"):**

* you enter: "1234.56"
* after submission:
  * without grouping: "1234,56"
  * with grouping: "1 234,56"

**Example 2 (locale "en"):**

* you enter "1234,56"
* after submission:
  * without grouping: "1234.56"
  * with grouping: error (because "," is the thousands separator; "1234,560" would have been accepted)
Merge branch '2.0' into 2.1

* 2.0:
  [Form] Fixed NumberToLocalizedStringTransformer to accept both comma and dot as decimal separator, if possible
  Show correct class name InputArgument in error message
  shows correct class name InputOption in error message
  The exception message should say which field is not mapped
  [HttpFoundation] Fix name sanitization after perfoming move
  Add check to Store::unlock to ensure file exists

Conflicts:
	src/Symfony/Bridge/Doctrine/Validator/Constraints/UniqueEntityValidator.php
	src/Symfony/Component/HttpFoundation/File/UploadedFile.php
	tests/Symfony/Tests/Component/Console/Input/InputArgumentTest.php
	tests/Symfony/Tests/Component/Console/Input/InputOptionTest.php
	tests/Symfony/Tests/Component/Form/Extension/Core/DataTransformer/NumberToLocalizedStringTransformerTest.php
	tests/Symfony/Tests/Component/HttpFoundation/File/FileTest.php
	tests/Symfony/Tests/Component/HttpKernel/HttpCache/StoreTest.php