libxml now grok Docbook-3.1.5 and Docbook-4.1.1 DTDs, this

popped out a couple of bugs and 3 speed issues, there is only
on minor speed issue left. Assorted collection of user reported
bugs and fixes:
- doc/encoding.html: added encoding aliases doc
- doc/xml.html: updates
- encoding.[ch]: added EncodingAliases functions
- entities.[ch] valid.[ch] debugXML.c: removed two serious
  bottleneck affecting large DTDs like Docbook
- parser.[ch] xmllint.c: added a pedantic option, will be useful
- SAX.c: redefinition of entities is reported in pedantic mode
- testHTML.c: uninitialized warning from gcc
- uri.c: fixed a couple of bugs
- TODO: added issue raised by Michael
Daniel

include/libxml/encoding.h

@@ -133,15 +133,39 @@ struct _xmlCharEncodingHandler {
 #endif /* LIBXML_ICONV_ENABLED */
 };
 
+/*
+ * Interfaces for encoding handlers
+ */
 void	xmlInitCharEncodingHandlers	(void);
 void	xmlCleanupCharEncodingHandlers	(void);
 void	xmlRegisterCharEncodingHandler	(xmlCharEncodingHandlerPtr handler);
-xmlCharEncoding xmlDetectCharEncoding	(const unsigned char* in,
+xmlCharEncodingHandlerPtr
+	xmlGetCharEncodingHandler	(xmlCharEncoding enc);
+xmlCharEncodingHandlerPtr
+	xmlFindCharEncodingHandler	(const char *name);
+
+
+/*
+ * Interfaces for encoding names and aliases
+ */
+int	xmlAddEncodingAlias		(const char *name,
+					 const char *alias);
+int	xmlDelEncodingAlias		(const char *alias);
+const char *
+	xmlGetEncodingAlias		(const char *alias);
+void	xmlCleanupEncodingAliases	(void);
+xmlCharEncoding
+	xmlParseCharEncoding		(const char* name);
+const char*
+	xmlGetCharEncodingName		(xmlCharEncoding enc);
+
+/*
+ * Interfaces directly used by the parsers.
+ */
+xmlCharEncoding
+	xmlDetectCharEncoding		(const unsigned char* in,
 					 int len);
-xmlCharEncoding xmlParseCharEncoding	(const char* name);
-const char*	xmlGetCharEncodingName	(xmlCharEncoding enc);
-xmlCharEncodingHandlerPtr xmlGetCharEncodingHandler(xmlCharEncoding enc);
-xmlCharEncodingHandlerPtr xmlFindCharEncodingHandler(const char *name);
+
 int	xmlCheckUTF8			(const unsigned char *utf);
 
 int	xmlCharEncOutFunc		(xmlCharEncodingHandler *handler,