[Dirvish] dirvish-expire loses on 'summary' directory

[Dave Howorth]

ml-it-dirvish at epigenomics.com wrote:
> dirvish-expire now runs through all images and the "current" directory
> where it finds the "summary" file and exits with an error because it is
> not what dirvish-expire expects.

OK, I understand now, thanks :)

I think this can be answered either as Paul suggested or by moving the
current link outside the bank (after making sure the banks and vaults
are directories rather than filesystems).

Cheers, Dave