Hello,

Is it possible to disable tag support with UnmarshalWithConf so we could unmarshal a konf instance to a struct without having to provides tags?

Reference: https://github.com/knadh/koanf/blob/master/koanf.go#L199

Like adding a new field called DisableTag as a boolean (in order to avoid compatibility break).

Let me know what you think.
Thank you in advance.