update to 2.7.2
changes:
-Portability fix: fix solaris compilation problem, fix compilation
if XPath is not configured in
-Bug fixes: nasty entity bug introduced in 2.7.0, restore old behaviour
when saving an HTML doc with an xml dump function,
HTML UTF-8 parsing bug, fix reader custom error handlers
-Improvement: xmlSave options for more flexibility to save
as XML/HTML/XHTML, handle leading BOM in HTML documents
cvs: ----------------------------------------------------------------------

(drochner)