Use the specified file to obtain the temporary Diffie-Hellman parameters.
void use_tmp_dh_file( const std::string & filename);
This function is used to load Diffie-Hellman parameters into the context from a file.
The name of the file containing the Diffie-Hellman parameters. The file must use the PEM format.
Thrown on failure.
Calls SSL_CTX_set_tmp_dh
.