https://api.dev.ssllabs.com/api/v3/getClients incorrectly indicates a highestProtocol of 771 (TLS 1.2) for clients that support TLS 1.3, which leads run_client_simulation() to incorrectly report "no connection" if the client would have actually connected using TLS 1.3.
This has been addressed by manually editing etc/client-simulation.txt to set the highest_protocol to 0x0304 for the clients that support TLS 1.3.
This PR modifies update_client_sim_data.pl to automatically apply the fix for clients that support TLS 1.3 in order to avoid a possible regression when etc/client-simulation.txt is updated.
When performing client simulations in "--ssl-native" mode, provide the client's list of supported curves to "$OPENSSL s_client" in order to make the results even more accurate.
This PR improves client simulation in "--ssl-native" mode:
* It changes ${protos[i]} to list the protocols that should be disabled rather than those that should be enabled, except in the case that the client only supports one protocol.
* It sets the values for ${tlsvers[i]}, which is used in run_client_simulation(), but was not defined.
* It adds a new variable, ${ciphersuites[i]}, that lists the TLSv1.3 cipher suites supported by a client.
Client simulation still produces false results in "--ssl-native" mode, but the results are better than before.
This fixes a bug which prevented the script from running properly. Also
the commit restores writing a correct comment header. In addition it
adds TLS 1.3 ciphers.
