They listed openssl s_client, which is awesome, but they neglected to mention openssl s_server, which is also an awesome way to set up easy reproductions/testca

They listed openssl s_client, which is awesome, but they neglected to mention openssl s_server, which is also an awesome way to set up easy reproductions/testcases for others when something like badssl might not be available due to firewalls and such.