SilcBuffer silc_command_payload_encode(SilcCommand cmd,
                                           SilcUInt32 argc,
                                           unsigned char **argv,
                                           SilcUInt32 *argv_lens,
                                           SilcUInt32 *argv_types,
                                           SilcUInt16 ident);

     Encodes Command Payload returning it to SilcBuffer.