actually put diagCmd into the super command so it can be run

cmd/ipfs/ipfs.go

@@ -59,6 +59,7 @@ Use "ipfs help <command>" for more information about a command.
 		cmdIpfsRun,
 		cmdIpfsName,
 		cmdIpfsBootstrap,
+		cmdIpfsDiag,
 	},
 	Flag: *flag.NewFlagSet("ipfs", flag.ExitOnError),
 }

peer/peer.go

@@ -105,6 +105,10 @@ func (p *Peer) GetLatency() (out time.Duration) {
 // Yep, should be EWMA or something. (-jbenet)
 func (p *Peer) SetLatency(laten time.Duration) {
 	p.Lock()
-	p.latency = laten
+	if p.latency == 0 {
+		p.latency = laten
+	} else {
+		p.latency = ((p.latency * 9) + laten) / 10
+	}
 	p.Unlock()
 }