Release of libxml2-2.9.3

* configure.ac: updated
* doc/*: regenerated
diff --git a/configure.ac b/configure.ac
index 48e0577..0260281 100644
--- a/configure.ac
+++ b/configure.ac
@@ -8,7 +8,7 @@
 
 LIBXML_MAJOR_VERSION=2
 LIBXML_MINOR_VERSION=9
-LIBXML_MICRO_VERSION=2
+LIBXML_MICRO_VERSION=3
 LIBXML_MICRO_VERSION_SUFFIX=
 LIBXML_VERSION=$LIBXML_MAJOR_VERSION.$LIBXML_MINOR_VERSION.$LIBXML_MICRO_VERSION$LIBXML_MICRO_VERSION_SUFFIX
 LIBXML_VERSION_INFO=`expr $LIBXML_MAJOR_VERSION + $LIBXML_MINOR_VERSION`:$LIBXML_MICRO_VERSION:$LIBXML_MINOR_VERSION