[DomCrawler] Added missing docblocks and removed unneeded return annotation.
[DomCrawler] fixed HTML5 form attribute handling
merged branch kepten/ticket_6239 (PR #8197)

This PR was squashed before being merged into the 2.3 branch (closes #8197).

Discussion
----------

[DomCrawler] fixed HTML5 form attribute handling

Fixed HTML5 form attribute handling and improved a test case to test more thoroughly

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #6239
| License       | MIT
| Doc PR        | no

Commits
-------

04e730e [DomCrawler] fixed HTML5 form attribute handling
Merge branch '2.2' into 2.3

* 2.2:
  fixes RequestDataCollector bug, visible when used on Drupal8
  [Console] fixed exception rendering when nested styles
  [Console] added some more information about OutputFormatter::replaceStyle()
  [Console] fixed the formatter for single-char tags
  [Console] Escape exception message during the rendering of an exception
  [BrowserKit] Fixed the handling of parameters when redirecting
  Typo fix
  HttpFoundation RequestTest - Fixed indentation and removed comments
  HttpFoundation Request test for #8619
  LICENSE files moved to meta folders
  added missing method in the UPGRADE file for 2.2 (closes #8941)
  [Translation] Removed an unneeded return annotation.
  [DomCrawler] Added missing docblocks and removed unneeded return annotation.

Conflicts:
	src/Symfony/Component/BrowserKit/Client.php
	src/Symfony/Component/DomCrawler/Crawler.php
Merge branch '2.3'

* 2.3:
  fixes RequestDataCollector bug, visible when used on Drupal8
  [Console] fixed exception rendering when nested styles
  [Console] added some more information about OutputFormatter::replaceStyle()
  [Console] fixed the formatter for single-char tags
  [Console] Escape exception message during the rendering of an exception
  [DomCrawler] fixed HTML5 form attribute handling
  Making tests pass on mac os x without this change tests would fail under mac os x at least in 10.8.2
  [BrowserKit] Fixed the handling of parameters when redirecting
  [Process] Properly close pipes after a Process::stop call
  fixed bytes conversion when used on 32-bits systems
  Typo fix
  HttpFoundation RequestTest - Fixed indentation and removed comments
  HttpFoundation Request test for #8619
  LICENSE files moved to meta folders
  added missing method in the UPGRADE file for 2.2 (closes #8941)
  [Form] Fixed: "required" attribute is not added to <select> tag if no empty value
  [Translation] Removed an unneeded return annotation.
  [DomCrawler] Added missing docblocks and removed unneeded return annotation.

Conflicts:
	src/Symfony/Component/Process/Tests/AbstractProcessTest.php