#6 spooling happening too frequently

[Graeme Hinchliffe]

Radspool is spooling packets too soon, and on occasion
becoming stuck trying to replay the same packet constantly.

If the RADACCT server rejects the packet as it sees it
as a duplicate, radspool will keep trying to resend
that packet, and hence never leave spool mode.

a solution to push the queue through is to stop and
then start radspool, which should provide enough of a
delay between packets for the RADACCT server to accept
the already accountin packet (which isn't ideal).

A better solution would be to hang back the retries a
longer period of time, and possibly try sending more
than one. If any of the other packets are ack'd then
chances are there is a problem with the none acking
packet and it should be dropped.