wsprd: print out host and port information so that tests (like playground) don't have to specify their own fixed port.
MultiPart: 2/2

Change-Id: I854e2dcc2df1fe540544989a2539613fe7f4aa31
diff --git a/services/wsprd/wspr.go b/services/wsprd/wspr.go
index 7f54cd3..2945ead 100644
--- a/services/wsprd/wspr.go
+++ b/services/wsprd/wspr.go
@@ -2,6 +2,8 @@
 
 import (
 	"flag"
+	"fmt"
+	"net"
 
 	"v.io/core/veyron2"
 
@@ -24,10 +26,12 @@
 	proxy := wspr.NewWSPR(ctx, *port, &listenSpec, *identd, nil)
 	defer proxy.Shutdown()
 
-	proxy.Listen()
+	addr := proxy.Listen()
 	go func() {
 		proxy.Serve()
 	}()
 
+	nhost, nport, _ := net.SplitHostPort(addr.String())
+	fmt.Printf("Listening on host: %s port: %s\n", nhost, nport)
 	<-signals.ShutdownOnSignals(ctx)
 }