zfs snapdir: from hidden to visible and back again

[Andrew Snow]

> And it seems that any snapshot accessed in this way gets automatically
> added to mounts. This doesn't seem to be reasonable.

One workaround I use is to use the "clone" command on any specific 
snapshots I want to have mounted, and then the rest can be left hidden.

When you are finished accessing the snapshot, simply destroy the clone.


- Andrew