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If the TLS server (e.g., openssl) closes connection with encrypted close-notify alert then `errno` is not explicitly set on the socket by LwIP stack. For this scenario, we must rely only on `ERR_TCP_TRANSPORT_CONNECTION_CLOSED_BY_FIN` return value as the connection close case and do the graceful connection closure. Closes https://github.com/espressif/esp-idf/issues/14724