Updated URL for lxml python bindings

Also fixed the warning for XPath threaded usage a bit
diff --git a/doc/site.xsl b/doc/site.xsl
index 934d591..11aaee2 100644
--- a/doc/site.xsl
+++ b/doc/site.xsl
@@ -399,7 +399,7 @@
       <li><a href="http://www.zlatkovic.com/projects/libxml/">Windows binaries</a></li>
       <li><a href="http://opencsw.org/packages/libxml2">Solaris binaries</a></li>
       <li><a href="http://www.explain.com.au/oss/libxml2xslt.html">MacOsX binaries</a></li>
-      <li><a href="http://codespeak.net/lxml/">lxml Python bindings</a></li>
+      <li><a href="http://lxml.de/">lxml Python bindings</a></li>
       <li><a href="http://cpan.uwinnipeg.ca/dist/XML-LibXML">Perl bindings</a></li>
       <li><a href="http://libxmlplusplus.sourceforge.net/">C++ bindings</a></li>
       <li><a href="http://www.zend.com/php5/articles/php5-xmlphp.php#Heading4">PHP bindings</a></li>