preparing for a 2.4.3 release even if it may not be ready yet redirected

* Makefile.am configure.in include/libxml/xmlwin32version.h:
  preparing for a 2.4.3 release even if it may not be ready yet
* catalog.c parser.c xmlIO.c include/libxml/catalog.h: redirected
  all file parsing lookup to go through the entity resolver, add
  to add an API to bypass it (needed to load catalogs themselves),
  some cleanup on the catalog code too.
* nanoftp.c: small cleanup
* doc/catalog.html: small update
Daniel
diff --git a/configure.in b/configure.in
index cf59ef3..622d901 100644
--- a/configure.in
+++ b/configure.in
@@ -6,7 +6,7 @@
 
 LIBXML_MAJOR_VERSION=2
 LIBXML_MINOR_VERSION=4
-LIBXML_MICRO_VERSION=2
+LIBXML_MICRO_VERSION=3
 LIBXML_VERSION=$LIBXML_MAJOR_VERSION.$LIBXML_MINOR_VERSION.$LIBXML_MICRO_VERSION
 LIBXML_VERSION_INFO=`expr $LIBXML_MAJOR_VERSION + $LIBXML_MINOR_VERSION`:$LIBXML_MICRO_VERSION:$LIBXML_MINOR_VERSION