Upgrade 1-11.38

vendor/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema.php

@@ -72,7 +72,7 @@ class HTMLPurifier_ConfigSchema
         $r = unserialize($contents);
         if (!$r) {
             $hash = sha1($contents);
-            trigger_error("Unserialization of configuration schema failed, sha1 of file was $hash", E_USER_ERROR);
+            throw new Exception("Unserialization of configuration schema failed, sha1 of file was $hash");
         }
         return $r;
     }