When we get a new packet, IF the old one is not currently being

	When we get a new packet, IF the old one is not currently being
	processed by a thread, AND we're waiting for a proxy reply, then
	we can discard the old request, as the NAS will never care about it.

	When we receive the reply from the home server (if any), we'll ignore
	it.

	Also, don't be smart (i.e. stupid) about re-using "curreq".  The
	code leaked memory by trying to re-use it, without calling
	request_alloc()