[Process] Properly close pipes after a Process::stop call
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