Various patches and bug fixes, and XInclude progresses:

- nanohttp.[ch]: applied Wayne Davison patches to access
  the WWW-Authorization header.
- parser.c: Closed Bug#30847: Problems when switching encoding
  in short files by applying Simon Berg's patch.
- valid.c: fixed a validation problem
- hash.c parser.h parserInternals.h testHTML.c testSAX.c tree.h
  xmlerror.h xmlmemory.h xmlversion.h.in: applied a DLL patch from
  Wayne Davison
- xpointer.[ch]: added first version of xmlXPtrBuildNodeList()
  need to be extended to non full nodes selections.
- xinclude.c: starts to work decently
Daniel

include/libxml/tree.h

@@ -374,11 +374,11 @@ struct _xmlDoc {
 /*
  * Variables.
  */
-extern xmlNsPtr baseDTD;
-extern int oldXMLWDcompatibility;/* maintain compatibility with old WD */
-extern int xmlIndentTreeOutput;  /* try to indent the tree dumps */
-extern xmlBufferAllocationScheme xmlBufferAllocScheme; /* alloc scheme to use */
-extern int xmlSaveNoEmptyTags;   /* save empty tags as <empty></empty> */
+LIBXML_DLL_IMPORT extern xmlNsPtr baseDTD;
+LIBXML_DLL_IMPORT extern int oldXMLWDcompatibility;/* maintain compatibility with old WD */
+LIBXML_DLL_IMPORT extern int xmlIndentTreeOutput;  /* try to indent the tree dumps */
+LIBXML_DLL_IMPORT extern xmlBufferAllocationScheme xmlBufferAllocScheme; /* alloc scheme to use */
+LIBXML_DLL_IMPORT extern int xmlSaveNoEmptyTags;   /* save empty tags as <empty></empty> */
 
 /*
  * Handling Buffers.
@@ -533,6 +533,10 @@ void		xmlTextConcat		(xmlNodePtr node,
 					 int len);
 void		xmlFreeNodeList		(xmlNodePtr cur);
 void		xmlFreeNode		(xmlNodePtr cur);
+void		xmlSetTreeDoc		(xmlNodePtr tree,
+					 xmlDocPtr doc);
+void		xmlSetListDoc		(xmlNodePtr list,
+					 xmlDocPtr doc);
 
 /*
  * Namespaces