Merge branch '2.3'

* 2.3:
  bumped Symfony version to 2.3.6
  updated VERSION for 2.3.5
  updated CHANGELOG for 2.3.5
  Set cost type to integer
  bumped Symfony version to 2.2.9
  updated VERSION for 2.2.8
  updated CHANGELOG for 2.2.8
  bumped the version
  fixed typo
  updated VERSION for 2.2.7
  update CONTRIBUTORS for 2.2.7
  updated CHANGELOG for 2.2.7
  bugix: CookieJar returns cookies with domain "domain.com" for domain "foodomain.com"
  fixed HTML5 form attribute handling XPath query
  Removed old way of building icu data.

Conflicts:
	src/Symfony/Component/HttpKernel/Kernel.php

Author: fabpot

Encoder/BCryptPasswordEncoder.php

@@ -42,7 +42,7 @@ public function __construct($cost)
             throw new \InvalidArgumentException('Cost must be in the range of 4-31.');
         }
 
-        $this->cost = sprintf('%02d', $cost);
+        $this->cost = $cost;
     }
 
     /**