package require Tcl
8.5.13

Steps:
Opening server tls socket (tls::socket)
Client connects and tls1.3 handshake completes successfully
Data exchanged
Server tls socket closed (close)
close_notify received from client
Server sent [ACK]
Client sent [FIN, ACK]
Server sent [ACK]
Server sent [RST, ACK]

Questions:
1) no response to close_notify sent by server? expected?
2) if disabled tls1.3 (i.e. set to false), then also no response to close_notify sent by server? expected?
3) how to fix so that server will respond to client's close_notify

This is fixed in [1505883e4a18b50e] and [cbeb34c75f0f49c7]. We now detect an EOF
due to close_notify from the peer via the SSL_ERROR_ZERO_RETURN status. We also
now send the close_notify as part SSL_shutdown in the TlsIO.c close function. So,
when the server closes the connection, the close_notify will be sent to the
client.