Added release notes for 4.2.9

Boy Baukema · Boy Baukema · commit cc201beeccee · 2014-11-20T12:35:35.000+01:00
diff --git a/docs/release_notes/4.2.9.md b/docs/release_notes/4.2.9.md
@@ -0,0 +1,4 @@
+# OpenConext EngineBlock v4.2.9 Release Notes #
+
+Bugfix release: 
+[Improve dumping attachments to syslog #71](https://github.com/OpenConext/OpenConext-engineblock/issues/71).
