Fix the logout path when not using the router

This needs to use the base url, not the base path, so that it goes
through the front controller when not using url rewriting.

src/Symfony/Bundle/SecurityBundle/Templating/Helper/LogoutUrlHelper.php

@@ -101,7 +101,7 @@ private function generateLogoutUrl($key, $referenceType)
         if ('/' === $logoutPath[0]) {
             $request = $this->container->get('request');
 
-            $url = UrlGeneratorInterface::ABSOLUTE_URL === $referenceType ? $request->getUriForPath($logoutPath) : $request->getBasePath().$logoutPath;
+            $url = UrlGeneratorInterface::ABSOLUTE_URL === $referenceType ? $request->getUriForPath($logoutPath) : $request->getBaseUrl().$logoutPath;
 
             if (!empty($parameters)) {
                 $url .= '?'.http_build_query($parameters);