preparing 2.7.0 release remove some testing traces remove some warnings

* configure.in, doc/*: preparing 2.7.0 release
* tree.c: remove some testing traces
* parser.c xmlIO.c xmlschemas.c: remove some warnings
Daniel

svn path=/trunk/; revision=3788
diff --git a/doc/APIchunk13.html b/doc/APIchunk13.html
index b71e8f1..2e8417f 100644
--- a/doc/APIchunk13.html
+++ b/doc/APIchunk13.html
@@ -404,7 +404,8 @@
 <a href="html/libxml-xmlreader.html#xmlTextReaderGetRemainder">xmlTextReaderGetRemainder</a><br />
 <a href="html/libxml-xmlreader.html#xmlTextReaderStandalone">xmlTextReaderStandalone</a><br />
 </dd><dt>difference</dt><dd><a href="html/libxml-xpathInternals.html#xmlXPathDifference">xmlXPathDifference</a><br />
-</dd><dt>different</dt><dd><a href="html/libxml-catalog.html#xmlACatalogAdd">xmlACatalogAdd</a><br />
+</dd><dt>different</dt><dd><a href="html/libxml-tree.html#_xmlBuffer">_xmlBuffer</a><br />
+<a href="html/libxml-catalog.html#xmlACatalogAdd">xmlACatalogAdd</a><br />
 <a href="html/libxml-tree.html#xmlBuildQName">xmlBuildQName</a><br />
 <a href="html/libxml-catalog.html#xmlCatalogAdd">xmlCatalogAdd</a><br />
 <a href="html/libxml-tree.html#xmlNodeGetBase">xmlNodeGetBase</a><br />