Prevent initialization deadlock bug

If the server was signaled to shutdown when the Node was still waiting
to read its configuration, the configReady channel would never fire,
causing a lockup in NewNode().

node/node.go

@@ -96,7 +96,11 @@ func New(parentCtx context.Context, session *concurrency.Session, ice Icecast, n
 			n.updateIcecast()
 		}
 	}()
-	<-configReady
+	select {
+	case <-ctx.Done():
+		return nil, ctx.Err()
+	case <-configReady:
+	}
 
 	// Register the Icecast endpoints. First the gossip service, below
 	// StatusEndpointPrefix with gossipPort, then the public Icecast