buffered-sql, radsqlrelay and fault resilience

[Yann Belin]

> We then have a detail reader (see "copy-acct-to-home-server"
> virtual server) that reads this file and relays it to the
> management RADIUS server for centralised logging.
>
> If the management server goes down, the files on disc just grow
> until it comes back again and then the logs are relayed over.
>
> It works well, and means that there are no dependencies on the
> management server for service to be operational.

Checking that now. I'd rather avoid having a radius server instance
running on management server, but I don't think I have much other
options here.