release of libxml2 2.6.28 Daniel

* doc/* configure.in NEWS: release of libxml2 2.6.28
Daniel

svn path=/trunk/; revision=3601
diff --git a/configure.in b/configure.in
index 5e7ca7b..c355498 100644
--- a/configure.in
+++ b/configure.in
@@ -5,7 +5,7 @@
 
 LIBXML_MAJOR_VERSION=2
 LIBXML_MINOR_VERSION=6
-LIBXML_MICRO_VERSION=27
+LIBXML_MICRO_VERSION=28
 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