Fix the URL of the SAX docuemntation from James

as it has moved
diff --git a/doc/xml.html b/doc/xml.html
index d2cc00d..d6abd50 100644
--- a/doc/xml.html
+++ b/doc/xml.html
@@ -508,7 +508,7 @@
   <li>If you need to parse large files, check the <a
     href="xmlreader.html">xmlReader</a> API tutorial</li>
   <li><a href="mailto:james@daa.com.au">James Henstridge</a> wrote <a
-    href="http://www.daa.com.au/~james/gnome/xml-sax/xml-sax.html">some nice
+    href="http://www.jamesh.id.au/articles/libxml-sax/libxml-sax.html">some nice
     documentation</a> explaining how to use the libxml SAX interface.</li>
   <li>George Lebl wrote <a
     href="http://www-106.ibm.com/developerworks/library/l-gnome3/">an article