flags: Remove anonymous, ratelimit, json and web-address flags.

- Web address now uses the port + 1 from the API address port directly.
- Remove ratelimiting, ratelimiting will be achieved if necessary through
  iptables.
- Remove json flag, not needed anymore.
- Remove anonymous flag, server will be no more anonymous for play.minio.io
  we will use demo credentials.

main.go

@@ -121,13 +121,9 @@ func registerApp() *cli.App {
 	// register all flags
 	registerFlag(configFolderFlag)
 	registerFlag(addressFlag)
-	registerFlag(webAddressFlag)
 	registerFlag(accessLogFlag)
-	registerFlag(rateLimitFlag)
-	registerFlag(anonymousFlag)
 	registerFlag(certFlag)
 	registerFlag(keyFlag)
-	registerFlag(jsonFlag)
 
 	// set up app
 	app := cli.NewApp()