- added the patch from Carl Nygard <cnygard@bellatlantic.net>

which allow impressive speed improvement on dataset with large text
   pieces, but at the cost of broken binary compatibility and slightly
   bigger memory usage.  Configure with --with-buffers to activate them,
   they are protected with XML_USE_BUFFER_CONTENT define.
 - added xmlCleanupPredefinedEntities(), memory allocation cleanup
Daniel

parser.c

@@ -6740,6 +6740,7 @@ int xmlSAXUserParseMemory(xmlSAXHandlerPtr sax, void *user_data,
 void
 xmlCleanupParser(void) {
     xmlCleanupCharEncodingHandlers();
+    xmlCleanupPredefinedEntities();
 }
 
 /**