add failing tests
[wip] use chunked decoder in proxy
Merge branch 'master' into kazuho/expr/proxy/chunked-decoder
[bugfix][proxy] connection state was becoming wrong if the server sent connection: close after transfer-encoding: chunked
Merge branch 'master' into kazuho/expr/proxy/chunked-decoder
Merge branch 'kazuho/expr/proxy/chunked-decoder' (close #54)