skip checking master peers if not starting master

weed/command/server.go

@@ -156,9 +156,11 @@ func runServer(cmd *Command, args []string) bool {
 		*isStartingFiler = true
 	}
 
+	if *isStartingMasterServer {
 		_, peerList := checkPeers(*serverIp, *masterOptions.port, *masterOptions.peers)
 		peers := strings.Join(peerList, ",")
 		masterOptions.peers = &peers
+	}
 
 	// ip address
 	masterOptions.ip = serverIp