Client respects http_proxy environment variable, to connect to localhost server.

I am behind a NTLM proxy. To get programs like git through the proxy, I use a local authenticating proxy and define the http_proxy and https_proxy environment variables appropriately. Catlight respects these variables, which is really nice, except that I don't run the proxy all the time. Unfortunately catlight uses these variables for the "client" to connect to the server on localhost and when the proxy is not running, catlight fails to connect and the gears keep spinning and spinning.

Please don't make the client respect the http_proxy and https_proxy environment variables to connect to the localhost.