Added sample radvd.conf for testing the minimal-net server

examples/contiki/radvd.conf.sample

@@ -0,0 +1,14 @@
+interface tap0
+{
+   AdvSendAdvert on;
+   MinRtrAdvInterval 3;
+   MaxRtrAdvInterval 20;
+
+   prefix aaaa::/64
+   {
+  	AdvOnLink on; 
+        AdvAutonomous on; 
+        AdvRouterAddr on; 
+
+   };
+};