debian: Create new changelog entry to please new tools

dpkg-source: error: can't build with source format '3.0 (native)': native package version may not have a revision
diff --git a/debian/changelog b/debian/changelog
index 791eb9d..0ba539f 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,4 +1,10 @@
-openggsn (0.91+git33-1) precise; urgency=low
+openggsn (0.91+git33+nmu1) UNRELEASED; urgency=medium
+
+  * Non-maintainer upload.
+
+ -- Holger Hans Peter Freyther <holger@freyther.de>  Tue, 23 Sep 2014 16:38:32 +0200
+
+openggsn (0.91+git33) precise; urgency=low
 
   * Fix init script.