SLING-7167 Adjust READMEs

add uniform header linking to Sling project

git-svn-id: https://svn.apache.org/repos/asf/sling/trunk@1810815 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/README.md b/README.md
index 8c1e8b1..a3d8bcf 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,6 @@
-Apache Sling Form Based Cookie Authenticator
+# Apache Sling Form Based Authentication Handler
+
+This module is part of the [Apache Sling](https://sling.apache.org) project.
 
 Bundle implementing form based authentication with login and logout support.
 Authentication state is maintained in a Cookie or in an HTTP Session. The