preparing release 2.6.15 cleanups Daniel

* ChangeLog NEWS configure.in doc/*: preparing release 2.6.15
* debugXML.c nanoftp.c xmlschemas.c xmlschemastypes.c: cleanups
Daniel
diff --git a/doc/APIchunk3.html b/doc/APIchunk3.html
index d6697c2..5849049 100644
--- a/doc/APIchunk3.html
+++ b/doc/APIchunk3.html
@@ -214,6 +214,7 @@
 <a href="html/libxml-valid.html#xmlValidateAttributeDecl">xmlValidateAttributeDecl</a><br />
 <a href="html/libxml-valid.html#xmlValidateAttributeValue">xmlValidateAttributeValue</a><br />
 <a href="html/libxml-valid.html#xmlValidateDocumentFinal">xmlValidateDocumentFinal</a><br />
+<a href="html/libxml-valid.html#xmlValidateDtd">xmlValidateDtd</a><br />
 <a href="html/libxml-valid.html#xmlValidateOneAttribute">xmlValidateOneAttribute</a><br />
 <a href="html/libxml-valid.html#xmlValidateOneElement">xmlValidateOneElement</a><br />
 <a href="html/libxml-valid.html#xmlValidateOneNamespace">xmlValidateOneNamespace</a><br />