• Enhancement: Return a useful error if attempting to use a unix domain socket without a Host header.
• Bugfix: Don't attempt to keepalive a http 1.0 connection with no Connection header (Thanks @guanglinlv for the report).
• Bugfix: Only look for a single 's' in the scheme, and report the uri in any URI parsing errors.
• Bugfix: _handle_continue return value order didn't match with expectation. (Thanks @DilipSimha for the report).