Move to URL based syntax formatting. (#3092)

For command line arguments we are currently following

- <node-1>:/path ... <node-n>:/path

This patch changes this to

- http://<node-1>/path ... http://<node-n>/path

cmd/globals.go

@@ -56,7 +56,7 @@ var (
 	// Minio local server address (in `host:port` format)
 	globalMinioAddr = ""
 	// Minio default port, can be changed through command line.
-	globalMinioPort = 9000
+	globalMinioPort = "9000"
 	// Holds the host that was passed using --address
 	globalMinioHost = ""
 	// Peer communication struct