Comment 4 for bug 771512

I'm still blaming eventlet for this. Looking at the logs, it looks like the sheer volume of requests simply makes it take more than 5 seconds before the event loop in eventlet gets back to the attempt to establish a connection. We can optimise the time-per-request, but that'll won't solve anything, it'll just hide the problem until we try 100 or 200 requests at a time. Same if we increase the timeout.