preparing 2.4.17 release updated and rebuilt the docs fixed a comment

* configure.in: preparing 2.4.17 release
* doc/*: updated and rebuilt the docs
* xpath.c: fixed a comment
* python/libxml.c: fixed a possible reentrancy problem
Daniel

doc/html/libxml-lib.html

@@ -204,6 +204,11 @@ HREF="libxml-catalog.html"
 > &#8212; </DT
 ><DT
 ><A
+HREF="libxml-c14n.html"
+>c14n</A
+> &#8212; </DT
+><DT
+><A
 HREF="libxml-threads.html"
 >threads</A
 > &#8212; </DT
@@ -248,7 +253,8 @@ HREF="libxml-xmlmemory.html"
 >This section contains the API reference for libxml. All
     the public interfaces are documented here. This reference guide is
     build by extracting comments from the code sources. </P
-></DIV
+>_functions;
+    </DIV
 ><DIV
 CLASS="NAVFOOTER"
 ><BR