Merge branch '3.4' into 4.3

* 3.4:
  [Config] Disable default alphabet sorting in glob function due of unstable sort
  [Serializer] Improve messages for unexpected resources values
  [SecurityBundle] correct types for default arguments for firewall configs

Author: nicolas-grekas

Resource/GlobResource.php

@@ -99,7 +99,9 @@ public function getIterator()
         $prefix = str_replace('\\', '/', $this->prefix);
 
         if (0 !== strpos($this->prefix, 'phar://') && false === strpos($this->pattern, '/**/') && (\defined('GLOB_BRACE') || false === strpos($this->pattern, '{'))) {
-            foreach (glob($this->prefix.$this->pattern, \defined('GLOB_BRACE') ? GLOB_BRACE : 0) as $path) {
+            $paths = glob($this->prefix.$this->pattern, GLOB_NOSORT | (\defined('GLOB_BRACE') ? GLOB_BRACE : 0));
+            sort($paths);
+            foreach ($paths as $path) {
                 if ($this->excludedPrefixes) {
                     $normalizedPath = str_replace('\\', '/', $path);
                     do {