add HostAddress2 & HostPort in utility.go

utils.go

@@ -15,11 +15,27 @@ import (
 	"time"
 )
 
+/////////////////////////////////////////
+// network utility
+/////////////////////////////////////////
+
 // HostAddress composes a ip:port style address. Its opposite function is net.SplitHostPort.
 func HostAddress(host string, port int) string {
 	return net.JoinHostPort(host, strconv.Itoa(port))
 }
 
+func HostAddress2(host string, port string) string {
+	return net.JoinHostPort(host, port)
+}
+
+func HostPort(addr string) (string, string, error) {
+	return net.SplitHostPort(addr)
+}
+
+/////////////////////////////////////////
+// count watch
+/////////////////////////////////////////
+
 type CountWatch struct {
 	start time.Time
 }