Faster NTL

NTL appear to have upgraded our internet connection at some point. We now get around 1800Kbit/s download, which is presumably a nominal 2Mbit/s service; uploads top out at around 170Kbit/s. I don't know when this happened, as I don't regularly monitor the speed of our connection.

I still have the measures described here in place, though with the rate limit now at 199Kbit.