The following functions are deprecated in OpenSSL 3.0 and used in net_ssl.cpp: `RSA_free`, `EC_KEY_free`, `RSA_new`, `RSA_generate_key_ex`, `EC_KEY_set_group`, `EC_KEY_generate_key`.
Since EVP_RSA_gen was added in OpenSSL 3.0 and since the aforementioned functions were deprecated in OpenSSL 3.0, I check if the OpenSSL version >= 3.0, and use EVP_RSA_gen instead of everything else up to assigning the private key to the certificate in `create_rsa_ssl_certificate`.
I also deleted `create_ec_ssl_certificate` since it wasn't used.
jeffro256
aa3abe2c03