applied patch from Mark Vakoc except the API change, preserved it. updated

* debugXML.c: applied patch from Mark Vakoc except the API
  change, preserved it.
* doc/*: updated the docs to point to the search engine for
  information lookup or before bug/help reports.
Daniel
diff --git a/doc/downloads.html b/doc/downloads.html
index c4def4a..45b9841 100644
--- a/doc/downloads.html
+++ b/doc/downloads.html
@@ -96,7 +96,7 @@
 <p>The latest versions of libxml can be found on <a href="ftp://xmlsoft.org/">xmlsoft.org</a> (<a href="ftp://speakeasy.rpmfind.net/pub/libxml/">Seattle</a>, <a href="ftp://fr.rpmfind.net/pub/libxml/">France</a>) or on the <a href="ftp://ftp.gnome.org/pub/GNOME/MIRRORS.html">Gnome FTP server</a> either
 as a <a href="ftp://ftp.gnome.org/pub/GNOME/sources/libxml2/2.4/">source
 archive</a>
-, Antonin Sprinzl also provide <a href="ftp://gd.tuwien.ac.at/pub/libxml/">a
+ , Antonin Sprinzl also provide <a href="ftp://gd.tuwien.ac.at/pub/libxml/">a
 mirror in Austria</a>. (NOTE that you need both the <a href="http://rpmfind.net/linux/RPM/libxml2.html">libxml(2)</a> and <a href="http://rpmfind.net/linux/RPM/libxml2-devel.html">libxml(2)-devel</a>
 packages installed to compile applications using libxml.) <a href="mailto:igor@stud.fh-frankfurt.de">Igor  Zlatkovic</a> is now the
 maintainer of the Windows port, <a href="http://www.fh-frankfurt.de/~igor/projects/libxml/index.html">he