content-type is set by default even for empty body #31

Generic request will supply a default content-type of application/x-www-form-urlencoded -

While this is helpful, this can have negative consequences, and we cannot disable the behavior. In cases where there is no body, or body is set and empty, the content-type is set. In these cases, content-type should not be set at all. It must be set to something to avoid the behavior.

So I'm opening this issue to start discussion. Is it possible that:

1. Net::HTTP does not supply default content type for empty body?
2. Is it ok to introduce an option on request to turn off this behavior?
3. Net::HTTP default content type is application/octet-stream instead of application/x-www-form-urlencoded