[Ovmsdev] Async events and config updates

[Michael Balzer]

Frank Demes found an issue in the Twizy code that may affect other vehicles and commands as well, please check your code:

I'm using the ConfigChanged() hook to process config changes, it's triggered by the "config.changed" and "config.mounted" events.

In my command implementation I previously relied on this hook being called inline from MyConfig.SetParamValue…(), so my internal state would be updated
immediately. Due to events now being processed asynchronously this is no longer valid.

Regards,
Michael

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