release of 2.6.22 updated doc and rebuild. added XML_SAVE_NO_XHTML

* NEWS configure.in doc//*: release of 2.6.22 updated doc and
  rebuild.
* xmlsave.c include/libxml/xmlsave.h: added XML_SAVE_NO_XHTML
  xmlSaveOption
* xmlschemas.c: minor cleanups
Daniel
34 files changed