Disable XXE processing in Libxml

A fix for a security vulnerability reported by Maximilian Hils.

lib/soap.js

@@ -64,7 +64,6 @@ const NAMESPACES = {
 
 const LIBXMLJS_PARSE_OPTIONS = {
   "nocdata": true,
-  "noent": true,
   "recover": config.get("XML_RECOVER"),
   "ignore_enc": config.get("XML_IGNORE_ENC")
 };