fix bug with go-config panic

See: https://github.com/micro/go-config/issues/49

cmd/cmd.go

@@ -87,6 +87,11 @@ var (
 			EnvVar: "MICRO_REGISTER_INTERVAL",
 			Usage:  "Register interval in seconds",
 		},
+		cli.StringFlag{
+			Name:   "server",
+			EnvVar: "MICRO_SERVER",
+			Usage:  "Server for go-micro; rpc",
+		},
 		cli.StringFlag{
 			Name:   "server_name",
 			EnvVar: "MICRO_SERVER_NAME",
@@ -144,11 +149,6 @@ var (
 			Usage:  "Selector used to pick nodes for querying",
 			Value:  "cache",
 		},
-		cli.StringFlag{
-			Name:   "server",
-			EnvVar: "MICRO_SERVER",
-			Usage:  "Server for go-micro; rpc",
-		},
 		cli.StringFlag{
 			Name:   "transport",
 			EnvVar: "MICRO_TRANSPORT",