Status monitor

The monitor status returns the current system state.

{
    "state": "ok"
}

Other legal state values are: init, started, ok, shutting down, unknown state (the last should never occur)

The monitor call status?change-state=stop the system can be told to shut down. The monitor call status?change-state=fast-stop the system can be told to shut down using the fast shutdown mode.

In the fast shutdown mode, the contents of the auxiliary block and chunk index is not written to disk and the system is left marked as dirty.