[Form] Allowed binding false to a checkbox.
[Form] Added a SimpleFormTest test case.
Updated croatian validator translation

Updated croatian validator translation (collection, IBAN, ISBN, ISSN)
merged branch aubx/master (PR #7802)

This PR was merged into the master branch.

Discussion
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Updated croatian validator translation from v2.0

Updated croatian validator translation (collection, IBAN, ISBN, ISSN)

Commits
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37443ac Updated croatian validator translation
merged branch jakzal/checkbox-type-false (PR #7789)

This PR was merged into the master branch.

Discussion
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[Form] Allowed binding false to a checkbox

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | no
| BC breaks?    | yes
| Deprecations? | no
| Tests pass?   | [![Build Status](https://travis-ci.org/jakzal/symfony.png?branch=checkbox-type-false)](https://travis-ci.org/jakzal/symfony)
| Fixed tickets | #7139
| License       | MIT
| Doc PR        | -

Commits
-------

24ef8d2 [Form] Added a SimpleFormTest test case.
e493984 [Form] Allowed binding false to a checkbox.
Rename requireHyphens to requireHyphen for Issn constraint
[Filesystem] Added a missing test case for Filesystem::dumpFile().
merged branch jakzal/dumpfile-tests (PR #7801)

This PR was merged into the master branch.

Discussion
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[Filesystem] Added a missing test case for Filesystem::dumpFile()

This PR adds a test case for the ``Filesystem::dumpFile()`` method (introduced in #7753).

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | [![Build Status](https://travis-ci.org/jakzal/symfony.png?branch=dumpfile-tests)](https://travis-ci.org/jakzal/symfony)
| Fixed tickets | -
| License       | MIT
| Doc PR        | -

Commits
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8fcf4c2 [Filesystem] Added a missing test case for Filesystem::dumpFile().
merged branch ajgarlag/fix-issn-option (PR #7804)

This PR was merged into the master branch.

Discussion
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[Validator] Rename requireHyphens to requireHyphen for Issn constraint

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

While writing the documentation for the new Issn validator submitted yesterday at https://github.com/symfony/symfony/pull/7756, I've realized that the option ```requireHyphens``` should be renamed to ```requireHyphen``` because only one hyphen is allowed in the ISSN value.

Commits
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94173ec Rename requireHyphens to requireHyphen for Issn constraint
[Validator] Hungarian translation for the ISSN validator
merged branch maerlyn/master (PR #7805)

This PR was merged into the master branch.

Discussion
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[Validator] Hungarian translation for the ISSN validator

Commits
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cd2f0a6 [Validator] Hungarian translation for the ISSN validator
Added currency form type and validator
clarified how/when to use client or guessed mime-types and extensions on a File instance (closes #5039)
[HttpFoundation] added some more phpdocs to clarify usage
[HttpFoundation] added a way to inject a custom magic file into FileinfoMimeTypeGuesser (closes #6963)
[HttpFoundation] fixed phpdoc
[HttpFoundation] updated the list of known mime types (sync from Apache)
merged branch mvrhov/currency (PR #6566)

This PR was merged into the master branch.

Discussion
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[2.3] Added currency locale data, form type and validator

Bug fix: no
Feature addition: yes
Backwards compatibility break: no
Symfony2 tests pass: yes
License of the code: MIT
Documentation PR: symfony/symfony-docs#2105

Commits
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5609aae Added currency form type and validator
merged branch fabpot/mimetypes (PR #7809)

This PR was merged into the master branch.

Discussion
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[WIP][HttpFoundation] File mime types and extensions

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | yes
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #5039, #6963, #5258, #7415, #5615
| License       | MIT
| Doc PR        | n/a

This pull request addresses most of the issues regarding mime types and extension on File instances.

I've also created an issue on the docs to add more documentation about how things work (see symfony/symfony-docs#2542).

Commits
-------

acc2b6a [HttpFoundation] updated the list of known mime types (sync from Apache)
f85cdd2 [HttpFoundation] fixed phpdoc
1aa68da [HttpFoundation] added a way to inject a custom magic file into FileinfoMimeTypeGuesser (closes #6963)
29b5413 [HttpFoundation] added some more phpdocs to clarify usage
ee784fb clarified how/when to use client or guessed mime-types and extensions on a File instance (closes #5039)
[Validator] Added Polish translation for the currency validator.