proxy server should handle idle connection from the client

[anfernee]

when client doesn't send CloseRequest to proxy server, due to reasons like reset tunnel or timeout, the proxy server should still recognize it and close the corresponding remote connection.

[fejta-bot]

Issues go stale after 90d of inactivity.
Mark the issue as fresh with /remove-lifecycle stale.
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/lifecycle stale

[cheftako]

/remove-lifecycle stale

[cheftako]

/lifecycle frozen