Use getaddinfo instead of gethostbyname.
Updated CHANGES.
Cohttp_lwt_unix_net.connect: use labels for more clarity.
Merge pull request #34 from vbmithr/getaddinfo

Use getaddinfo instead of gethostbyname.
Do not force PF_INET when creating a TCP socket, use domain in sockaddr instead.
Request: add uri port in host: header if present. When reading a request, construct the uri using the host header field. Update test case accordingly.
Update CHANGES.