Hi,

With this issue, I would like to ask you to use the last version of the HTTP protocol in the BaseHTTPRequestHandler for Python 3.5.
Because this one uses the version 1.0 of the protocol for the backward-compatibility.

https://docs.python.org/3/library/http.server.html?highlight=protocol_version#http.server.BaseHTTPRequestHandler.protocol_version

When we develop an web app with Flask/Werkzeug or an other tool, the default version of 
the protocol is "HTTP/1.0". If we use Gunicorn, the protocol version is HTTP/1.1 and not 1.0, but this one can support the old version.

So, I propose to change the default version to the HTTP/1.1. It seems that the code of the server can handle this version without any problem.

HTTP 1.0 - http://www.ietf.org/rfc/rfc1945.txt - 1996
HTTP 1.1 - http://www.ietf.org/rfc/rfc2616.txt - 1999

In 2014, I think we can move to HTTP 1.1 by default.

Regards,

Stephane