traced an issue with mirror mode

traced an issue with mirror mode

we will only mirror, aka delete, when the hierarchy on the target is one that already exists on the source.
this is a consequence of the necessary scooping of the "*" under a hierarchy to be copied to the target,
rather than trying to copy at the same height for the directory trees (which will lead to a basement folder being
created under the remote target basement, i.e. /media/fred/archivedrive/basement/basement, rather than
copying direct contents.  so for now, we are limited by our use of rsync for this, unless there's a mode to
do a direct directory copy rather than its current behavior.