SilcDList
    silc_argument_list_parse_decoded(const unsigned char *payload,
                                     SilcUInt32 payload_len,
                                     SilcArgumentDecodeType dec_type);

    Parses argument list payload of arguments of the type `dec_type'.
    The returned list includes the already decoded arguments.  The caller
    is responsible of freeing the the contents of the list and the list
    itself.  Each entry in the list is SilcArgumentDecodedList.  The
    caller must free the returned list with silc_argument_list_free.