* c14n.c: fixed a few comments
* doc/*.html doc/*/*.html: regenerated the docs and added
  the C14N API
* doc/api.xsl doc/gnome-xml.sgml: fixups and added IDs
Daniel

* configure.in include/libxml/xmlwin32version.h: preparing 2.4.16
* doc/* python/libxml2class.txt: updated and rebuilt the docs,
  rebuilt the API and web site
* xpath.c: fixed #71978 portability bugs
Daniel

* doc/APIchunk*.html doc/parsedecl.py doc/api.xsl: generated
  an alphabetic index based on comments content
* doc/*: rebuilt the web site with the new references
Daniel