Merge branch '5.2' into 5.x

* 5.2:
  added missing gitattributes and gitignore
  allow CurlHttpClient on Windows
  [Security] Mark ExpiredLoginLinkStorage as experimental
  remove references to "Silex"

Author: derrabus

HttpClient.php

@@ -50,7 +50,7 @@ public static function create(array $defaultOptions = [], int $maxHostConnection
         }
 
         if (\extension_loaded('curl')) {
-            if ('\\' !== \DIRECTORY_SEPARATOR || ini_get('curl.cainfo') || ini_get('openssl.cafile') || ini_get('openssl.capath')) {
+            if ('\\' !== \DIRECTORY_SEPARATOR || isset($defaultOptions['cafile']) || isset($defaultOptions['capath']) || ini_get('curl.cainfo') || ini_get('openssl.cafile') || ini_get('openssl.capath')) {
                 return new CurlHttpClient($defaultOptions, $maxHostConnections, $maxPendingPushes);
             }