Fix ability to show all snapshots, add regex filtering for snapshot names
Description
I accidentally de-implemented a quasi-feature of shadow_copy_zfs to expose all snapshots (even ones with zero written). Support for regex filters for snapshots (include / exclude) should also be added.
I accidentally de-implemented a quasi-feature of shadow_copy_zfs to expose all snapshots (even ones with zero written). Support for regex filters for snapshots (include / exclude) should also be added.