destroy Key On Job Completion
When true, an EnqueuedJob.invokeOnCompletion handler is automatically set when the resulting TorCmd.Onion.Add object is enqueued. The handler calls AddressKey.Private.destroy upon job completion (either successfully or by cancellation/error).
NOTE: This setting has no effect when TorCmd.Onion.Add.new is being utilized, as there will be no AddressKey.Private to destroy.
Default: true