Merge branch '2.3' into 2.6

* 2.3:
  [Validator] Add missing pt_BR translations
  Add parsing of hexadecimal strings for PHP 7
  [Configuration] improve description for ignoreExtraKeys on ArrayNodeDefinition
  [Validator] Added missing Hungarian translation
  [Validator] Fixed grammar in Hungarian translation
  CS: Unary operators should be placed adjacent to their operands
  CS: Binary operators should be arounded by at least one space
  remove useless tests that fail in php 7
  [Translator] fix test for php 7 compatibility
  Update phpdoc of ProcessBuilder#setPrefix()

Conflicts:
	src/Symfony/Component/HttpFoundation/Session/Attribute/NamespacedAttributeBag.php
	src/Symfony/Component/PropertyAccess/PropertyAccessor.php
	src/Symfony/Component/Validator/Resources/translations/validators.pt_BR.xlf
	src/Symfony/Component/Yaml/Parser.php

Author: fabpot

Dumper/PhpDumper.php

@@ -1475,14 +1475,14 @@ private function getNextVariableName()
             $i = $this->variableCount;
 
             if ('' === $name) {
-                $name .= $firstChars[$i%$firstCharsLength];
-                $i = (int) ($i/$firstCharsLength);
+                $name .= $firstChars[$i % $firstCharsLength];
+                $i = (int) ($i / $firstCharsLength);
             }
 
             while ($i > 0) {
                 --$i;
-                $name .= $nonFirstChars[$i%$nonFirstCharsLength];
-                $i = (int) ($i/$nonFirstCharsLength);
+                $name .= $nonFirstChars[$i % $nonFirstCharsLength];
+                $i = (int) ($i / $nonFirstCharsLength);
             }
 
             ++$this->variableCount;