• set_keepalive now returns 2 if the connection was intentionally closed, to distinguish from actual errors.
• Merged pull request from @hamishforbes adding support for "100 Continue" responses.
• Merged pull request from @hamishforbes allowing request bodies to optionally be an iterator function to stream in large bodies.
• Merged pull request from @hamishforbes adding get_client_body_reader utility, which returns an iterator for the current client upstream request body.
• res.body_reader is now always a function, even if there is no body to be read.
• Added res.has_body boolean flag.
• Implemented streaming for HTTP 1.0 responses where no length is advertised. (Thanks @oikomi for the feature request).
• Fixed issue where body readers only honoured the initial chunk size. (Thanks @oikomi for the report).
• Added support for HTTP pipelining.