SYNOPSIS
        string get_root_uid(void)

DESCRIPTION
        Return the string to be used as root-uid.
        Under !native, the function is expendable.

HISTORY
        In 3.2.1@40, get_root_uid() was renamed to get_master_uid()
        and recieved a new semantic.

SEE ALSO
        get_bb_uid(M), get_master_uid(M), uids(C), creator_file(M), creator(E)