for export ciphers. Using ephemeral RSA key exchange for other purposes
violates the standard and can break interoperability with clients.
It is therefore strongly recommended to not use ephemeral RSA key
-exchange and use EDH (Ephemeral Diffie-Hellman) key exchange instead
+exchange and use DHE (Ephemeral Diffie-Hellman) key exchange instead
in order to achieve forward secrecy (see
L<SSL_CTX_set_tmp_dh_callback(3)|SSL_CTX_set_tmp_dh_callback(3)>).