Whether the Create function can open the CreateFlag parameter to the outside?

[chenyahui]

Now the Create function is forced to set CreateFlag to 1 (O_WRONLY). Is it possible to open this parameter?

We often modify the request according to our needs，such as: set CreateFlag to O_CREATE, set CreateParent to true.

Or make the internal/protocol、internal/rpc package public like v1, so everyone can use rpc directly?

https://github.com/colinmarc/hdfs/blob/master/file_writer.go#L69