EvseV2G: change terminate_connection_on_failed_response default to true

[hikinggrass]

This is very likely a safer default behavior since it keeps control of the V2G connection at the EVSE

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• I have performed a self-review of my code
• I have made corresponding changes to the documentation
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[SebaLukas]

The problem here is that some EVs dont like the immediately tcp/tls server shutdown and the cars wont charge about 5-30mins after this. Because the ECU crashed.
So the default should be false and not true

[kwoyhope]

The problem here is that some EVs dont like the immediately tcp/tls server shutdown and the cars wont charge about 5-30mins after this. Because the ECU crashed. So the default should be false and not true

How about setting SO_RCVTIMEO to short(ex, 1.5s) value on V2G_Resp_FAILED situation?
ie, not terminate socket connection immediately by EVSE on error but by socket recv timeout only when EV doesn't handle error immediately/correctly(ex, send SessionStopReq, or disconnect tcp/tls from EV(client) side first).
IMHO, this could help for both normal and abnormal(including PLC link fail) case of EV behavior.