Verify socket closure about http

[tarcieri]

Can anyone still reproduce this problem?

@schmurfy you perhaps?

[tarcieri]

I don't see #close getting called anywhere, so I'm going to go out on a limb and say this is still a problem

[schmurfy]

I will give it a try but I am not sure what caused the issue in the first place :/
The only condition I managed to isolate was the response from the server included:

Transfer-Encoding: chunked

I was also doing hundreds of requests in parallel using Celluloid::IO and I don't think each requests kept the connection open... The number of requests does not seems to change much, on the test server the issue was the same with half the load.

I am not sure how useful the informations are at least that's a start xD

[tarcieri]

It looks like we need to call @socket.close in #finish_response, however #finish_response isn't being called reliably

[ixti]

This was addressed in #115