Start-stop race with services enabled.

[evoskuil]

There is an easy-to-repro stop race when a stop is signaled during a start. This will invalidate the store (leaves flush lock) if write flushing is not enabled. The stop signal is properly handled once but the node.close call fails to terminate the services. The cause is well documented in the server sources, just needs to be refactored to guarantee order or idempotency.

[evoskuil]

This is not a significant issue, defer to later release, NLT v4.0