change server address from string to a type

unmaintained/repeated_vacuum/repeated_vacuum.go

@@ -3,6 +3,7 @@ package main
 import (
 	"flag"
 	"fmt"
+	"github.com/chrislusf/seaweedfs/weed/pb"
 	"log"
 	"math/rand"
 	"time"
@@ -32,7 +33,7 @@ func main() {
 	go func() {
 		for {
 			println("vacuum threshold", *garbageThreshold)
-			_, _, err := util.Get(fmt.Sprintf("http://%s/vol/vacuum?garbageThreshold=%f", *master, *garbageThreshold))
+			_, _, err := util.Get(fmt.Sprintf("http://%s/vol/vacuum?garbageThreshold=%f", pb.ServerAddress(*master).ToHttpAddress(), *garbageThreshold))
 			if err != nil {
 				log.Fatalf("vacuum: %v", err)
 			}
@@ -52,7 +53,7 @@ func main() {
 }
 
 func genFile(grpcDialOption grpc.DialOption, i int) (*operation.AssignResult, string) {
-	assignResult, err := operation.Assign(func() string { return *master }, grpcDialOption, &operation.VolumeAssignRequest{
+	assignResult, err := operation.Assign(func() pb.ServerAddress { return pb.ServerAddress(*master) }, grpcDialOption, &operation.VolumeAssignRequest{
 		Count:       1,
 		Replication: *replication,
 	})