- doc/encoding.html doc/xml.html: added I18N doc

- encoding.[ch] HTMLtree.[ch] parser.c HTMLparser.c: I18N encoding
  improvements, both parser and filters, added ASCII & HTML,
  fixed the ISO-Latin-1 one
- xmllint.c testHTML.c: added/made visible --encode
- debugXML.c : cleanup
- most .c files: applied patches due to warning on Windows and
  when using Sun Pro cc compiler
- xpath.c : cleanup memleaks
- nanoftp.c : added a TESTING preprocessor flag for standalong
  compile so that people can report bugs more easilly
- nanohttp.c : ditched socklen_t which was a portability mess
  and replaced it with unsigned int.
- tree.[ch]: added xmlHasProp()
- TODO: updated
- test/ : added more test for entities, NS, encoding, HTML, wap
- configure.in: preparing for 2.2.0 release
Daniel

include/libxml/encoding.h

@@ -70,7 +70,8 @@ typedef enum {
     XML_CHAR_ENCODING_8859_9=	18,/* ISO-8859-9 */
     XML_CHAR_ENCODING_2022_JP=  19,/* ISO-2022-JP */
     XML_CHAR_ENCODING_SHIFT_JIS=20,/* Shift_JIS */
-    XML_CHAR_ENCODING_EUC_JP=   21 /* EUC-JP */
+    XML_CHAR_ENCODING_EUC_JP=   21,/* EUC-JP */
+    XML_CHAR_ENCODING_ASCII=    22 /* pure ASCII */
 } xmlCharEncoding;
 
 /**