func init() {
	r := rand.New(rand.NewSource(time.Now().UnixNano()))
	for i := 7; i < 20; i++ {
		PeerID[i] = byte(r.Intn(256))
	}
}
init initializes a random PeerID for this client
package main
import (
	"log"
	"math/rand"
	"net/http"
	_ "net/http/pprof"
	"os"
	"os/signal"
	"syscall"
	"time"
)
var PeerID = [20]byte{'-', 'T', 'V', '0', '0', '0', '1'}