Merge branch '2.1'

* 2.1:
  fixed CS
  added doc comments
  added doc comments
  [Validator] Updated swedish translation
  Update src/Symfony/Component/Validator/Resources/translations/validators.de.xlf
  [2.1] Exclude tests from zips via gitattributes
  [HttpKernel][Translator] Fixed type-hints
  Updated lithuanian validation translation
  [DomCrawler] Allows using multiselect through Form::setValues().
  [Translation] forced the catalogue to be regenerated when a resource is added (closes symfony/translation#1)
  Unit test for patched method OptionsResolver::validateOptionValues().
  validateOptionValues throw a notice if an allowed value is set and the corresponding option isn't.
  [Form] Hardened code of ViolationMapper against errors
  [HttpFoundation] Fixed #5611 - Request::splitHttpAcceptHeader incorrect result order.
  [Form] Fixed negative index access in PropertyPathBuilder
  Update src/Symfony/Component/Validator/Resources/translations/validators.ro.xlf

Conflicts:
	src/Symfony/Component/DomCrawler/Form.php
	src/Symfony/Component/Process/Process.php

.gitattributes

@@ -0,0 +1,2 @@
+Tests/ export-ignore
+phpunit.xml.dist export-ignore

OptionsResolver.php

@@ -294,7 +294,7 @@ private function validateOptionsCompleteness(array $options)
     private function validateOptionValues(array $options)
     {
         foreach ($this->allowedValues as $option => $allowedValues) {
-            if (!in_array($options[$option], $allowedValues, true)) {
+            if (isset($options[$option]) && !in_array($options[$option], $allowedValues, true)) {
                 throw new InvalidOptionsException(sprintf('The option "%s" has the value "%s", but is expected to be one of "%s"', $option, $options[$option], implode('", "', $allowedValues)));
             }
         }

Tests/OptionsResolverTest.php

@@ -258,6 +258,30 @@ public function testResolveSucceedsIfOptionValueAllowed2()
         ), $this->resolver->resolve($options));
     }
 
+    public function testResolveSucceedsIfOptionalWithAllowedValuesNotSet()
+    {
+        $this->resolver->setRequired(array(
+            'one',
+        ));
+
+        $this->resolver->setOptional(array(
+            'two',
+        ));
+
+        $this->resolver->setAllowedValues(array(
+            'one' => array('1', 'one'),
+            'two' => array('2', 'two'),
+        ));
+
+        $options = array(
+            'one' => '1',
+        );
+
+        $this->assertEquals(array(
+            'one' => '1',
+        ), $this->resolver->resolve($options));
+    }
+
     /**
      * @expectedException Symfony\Component\OptionsResolver\Exception\InvalidOptionsException
      */