[SA-exim] Tweak for greylist cleaning

[Paul Makepeace]

In greylistclean.cron, for cleaning empty dirs: -depth -mindepth 1
might be useful. -depth outputs directories depth first so they're more
likely to get deleted in the right order. -mindepth 1 prevents the
tuplets/ directory from being deleted.

Cheers,
Paul

-- 
Paul Makepeace .............................. http://paulm.com/inchoate/

"If men are seduced by lovely things, then you're at a technical meeting
 without your laptop."
   -- http://paulm.com/toys/surrealism/