Add support for HTTP/1.1 for Transfer-Encoding: chunked
In order to be able to POST consensus (and vote) documents to public append-only logs over HTTP it would be useful to be able to "chunk" the data ("Transfer-Encoding: chunked"). This is an HTTP 1.1 thing.
We might get away with implementing 1.1 in the HTTP client code. A good start would be to see how forgiving the server code is.