Merge branch '2.3' into 2.6

* 2.3:
  replaced the last remaining is_integer() call
  [2.3] [Config] [Console] [DependencyInjection] [DomCrawler] [Form] [HttpKernel] [PropertyAccess] [Security] [Translation] [Yaml] static code analysis, code cleanup
  [Validator] Added missing galician (gl) translations
  [travis] Tests Security sub-components
  [travis] Tests Security sub-components
  CS fixes
  [travis] test with php nightly

Conflicts:
	src/Symfony/Component/Security/Http/Tests/Firewall/RememberMeListenerTest.php

Inline.php

@@ -285,7 +285,7 @@ private static function parseSequence($sequence, &$i = 0, $references = array())
     {
         $output = array();
         $len = strlen($sequence);
-        $i += 1;
+        ++$i;
 
         // [foo, bar, ...]
         while ($i < $len) {
@@ -344,7 +344,7 @@ private static function parseMapping($mapping, &$i = 0, $references = array())
     {
         $output = array();
         $len = strlen($mapping);
-        $i += 1;
+        ++$i;
 
         // {foo: bar, bar:foo, ...}
         while ($i < $len) {