lcb_make_http_request doesn't respect timeouts

Run the attached testcase on Windows (after fixing the host and such). The lcb_wait after calling lcb_make_http_request will hang for a very long time (perhaps forever) if the server is no longer accessible.

I tested this by starting the client. When it prints "sleeping" I pull the ethernet cable on my machine. If the lcb_make_http_request is replaced by lcb_get then you'll get a timeout which is expected.