Merge branch '2.3' into 2.7

* 2.3:
  Create PULL_REQUEST_TEMPLATE.md
  Remove duplicate validation in RedirectResponse
  [Yaml] fix default timezone to be UTC
  [DependencyInjection] fix dumped YAML string

Conflicts:
	src/Symfony/Component/DependencyInjection/Dumper/YamlDumper.php
	src/Symfony/Component/Yaml/Tests/InlineTest.php

Author: nicolas-grekas

Inline.php

@@ -512,7 +512,12 @@ private static function evaluateScalar($scalar, $references = array())
                     case preg_match('/^(-|\+)?[0-9,]+(\.[0-9]+)?$/', $scalar):
                         return (float) str_replace(',', '', $scalar);
                     case preg_match(self::getTimestampRegex(), $scalar):
-                        return strtotime($scalar);
+                        $timeZone = date_default_timezone_get();
+                        date_default_timezone_set('UTC');
+                        $time = strtotime($scalar);
+                        date_default_timezone_set($timeZone);
+
+                        return $time;
                 }
             default:
                 return (string) $scalar;

Tests/Fixtures/YtsSpecificationExamples.yml

@@ -754,7 +754,7 @@ yaml: |
     Billsmer @ 338-4338.
 php: |
   array(
-     'invoice' => 34843, 'date' => mktime(0, 0, 0, 1, 23, 2001),
+     'invoice' => 34843, 'date' => gmmktime(0, 0, 0, 1, 23, 2001),
      'bill-to' =>
       array( 'given' => 'Chris', 'family' => 'Dumars', 'address' => array( 'lines' => "458 Walkman Dr.\nSuite #292\n", 'city' => 'Royal Oak', 'state' => 'MI', 'postal' => 48046 ) )
      , 'ship-to' =>
@@ -879,7 +879,7 @@ yaml: |
 php: |
    array(
       'invoice' => 34843,
-      'date' => mktime(0, 0, 0, 1, 23, 2001),
+      'date' => gmmktime(0, 0, 0, 1, 23, 2001),
       'total' => 4443.52
    )
 ---

Tests/InlineTest.php

@@ -206,7 +206,7 @@ public function getTestsForParse()
             array("'on'", 'on'),
             array("'off'", 'off'),
 
-            array('2007-10-30', mktime(0, 0, 0, 10, 30, 2007)),
+            array('2007-10-30', gmmktime(0, 0, 0, 10, 30, 2007)),
             array('2007-10-30T02:59:43Z', gmmktime(2, 59, 43, 10, 30, 2007)),
             array('2007-10-30 02:59:43 Z', gmmktime(2, 59, 43, 10, 30, 2007)),
             array('1960-10-30 02:59:43 Z', gmmktime(2, 59, 43, 10, 30, 1960)),