daemon/examples: Update the distributed netns example.

The number of nodes used can depend on a command-line argument, but
node one should always exist.

daemon/examples/netns/distributed.py

@@ -123,7 +123,7 @@ def main():
     session.broker.handlerawmsg(msg)
 
     # start a shell on node 1
-    n[7].term("bash")
+    n[1].term("bash")
 
     # TODO: access to remote nodes is currently limited in this script