Should we always run the Outbox Sweeper if you have an Outbox

[iancooper]

The Outbox Sweeper will cause us to try and resend messages from the Outbox. At the moment, getting it to run is an "exercise left to the reader". But there is no reason that the command processor could not kick if off on a timer, if we chose to configure this. This might create a better pit of success - if you have an outbox, we will sweep it. We would just need to let you configure the interval at which you ran the sweeper process. We could also treat setting the interval as the parameter to cause us to run a sweeper for you.

@holytshirt ?