Update the OpenSSL Guide tutorials with changes to the demos

Update the OpenSSL Guide tutorials with changes to the demos

The demo code has changed to accept the hostname/port on the command line.
We update the tutorials to keep in sync with the demo code.

Reviewed-by: Paul Dale <pauli@openssl.org>
Reviewed-by: Tomas Mraz <tomas@openssl.org>
Reviewed-by: Richard Levitte <levitte@openssl.org>
Reviewed-by: Hugo Landau <hlandau@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/22552)