Account for localhost/testing sites in domain checks

app/Support/Utils.php

@@ -123,6 +123,10 @@ class Utils
             return $val;
         }
 
+        if ($result->hostname === 'localhost') {
+            return 'localhost';
+        }
+
         // Couldn't validate a domain, see if this is an IP address?
         if (filter_var($url, FILTER_VALIDATE_IP)) {
             return $url;

tests/UtilsTest.php

@@ -100,5 +100,6 @@ class UtilsTest extends TestCase
         $this->assertEquals('phpvms.co.uk', Utils::getRootDomain('http://phpvms.co.uk'));
         $this->assertEquals('phpvms.co.uk', Utils::getRootDomain('http://www.phpvms.co.uk'));
         $this->assertEquals('127.0.0.1', Utils::getRootDomain('http://127.0.0.1'));
+        $this->assertEquals('localhost', Utils::getRootDomain('http://localhost'));
     }
 }