remove the warning on the 2001 namespace remove some warnings when

* xinclude.c: remove the warning on the 2001 namespace
* parser.c parserInternals.c xpath.c: remove some warnings
  when compiling with MSVC6
* nanohttp.c: applied a patch when using _WINSOCKAPI_
Daniel
diff --git a/xpath.c b/xpath.c
index c42e009..9bf5571 100644
--- a/xpath.c
+++ b/xpath.c
@@ -8795,7 +8795,9 @@
 	    xmlGenericErrorContextNodeSet(stdout, ctxt->value->nodesetval);
 #endif
 
+#ifdef LIBXML_XPTR_ENABLED
 eval_predicates:
+#endif
 	op1 = ctxt->comp->last;
 	ctxt->comp->last = -1;