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.

server_fs_test.go

@@ -78,7 +78,6 @@ func (s *MyAPIFSCacheSuite) SetUpSuite(c *C) {
 	cloudServer := cloudServerConfig{
 		Path:        fsroot,
 		MinFreeDisk: 0,
-		Anonymous:   false,
 	}
 	cloudStorageAPI := getNewCloudStorageAPI(cloudServer)
 	httpHandler := getCloudStorageAPIHandler(cloudStorageAPI)