stun Add clarification to the README

And a big thank you to Peter Dunkley and Crocodile RCS for doing the
work involved in making this a module, instead of a compile time
options. Modules are cool. And easier to handle by pre-compiled
distributions/packages.

modules/stun/README

@@ -4,9 +4,9 @@ Peter Dunkley
 
    Crocodile RCS Ltd
 
-   Copyright © 2012 Crocodile RCS Ltd
+   Copyright © 2012 Crocodile RCS Ltd
 
-   Copyright © 2001-2003 FhG Fokus
+   Copyright © 2001-2003 FhG Fokus
      __________________________________________________________________
 
    Table of Contents
@@ -40,7 +40,8 @@ Chapter 1. Admin Guide
 1. Overview
 
    This module provides limited STUN server (RFC 5389) support for
-   Kamailio.
+   Kamailio. It's built for providing STUN support in the SIP signalling
+   channel, not being a standalone STUN/TURN server.
 
 2. Dependencies
 

modules/stun/doc/stun_admin.xml

@@ -16,7 +16,8 @@
 	<section>
 	<title>Overview</title>
 	<para>This module provides limited STUN server (RFC 5389) support for
-	&kamailio;.</para>
+	&kamailio;. It's built for providing STUN support in the SIP signalling
+	channel, not being a standalone STUN/TURN server.</para>
 	</section>
 
 	<section>