merged branch webfactory/fix-af-inet-define (PR #7535)

This PR was squashed before being merged into the master branch (closes #7535).

Discussion
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AF_* constants are only available with the sockets extension

Skip test if the extension is not available

Commits
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82e550b AF_* constants are only available with the sockets extension

src/Symfony/Component/HttpFoundation/Tests/IpUtilsTest.php

@@ -62,6 +62,10 @@ class IpUtilsTest extends \PHPUnit_Framework_TestCase
      */
     public function testAnIpv6WithOptionDisabledIpv6()
     {
+        if (!extension_loaded('sockets')) {
+            $this->markTestSkipped('Only works when the socket extension is enabled');
+        }
+
         if (defined('AF_INET6')) {
             $this->markTestSkipped('Only works when PHP is compiled with the option "disable-ipv6".');
         }