NAME
        Rename -- Rename a directory or file

    SYNOPSIS
        success = Rename( oldName, newName )
        D0                D1       D2

        bool rename(strptr, strptr)

    FUNCTION
        Rename() attempts to rename the file or directory specified as
        'oldName' with the name 'newName'. If the file or directory
        'newName' exists, Rename() fails and returns an error. Both
        'oldName' and the 'newName' can contain a directory specification.
        In this case, the file will be moved from one directory to another.

        Note: it is impossible to Rename() a file from one volume to
        another.

    INPUTS
        oldName - pointer to a null-terminated string
        newName - pointer to a null-terminated string

    RESULTS
        success - boolean

    SEE ALSO
        relabel()