Is your feature request related to a problem? Please describe.
We are trying dragonfly out with a network storage attached to it - limited to a certain size.
Since dragonfly doesn't look like it is removing old snapshots (does it?), this volume in kubernetes is getting full quickly.

Describe the solution you'd like
I would like to be able to specify a max_snapshot_count flag to limit the amount of snapshots retained.

Describe alternatives you've considered
Not using a backing storage - not idea though.

Additional context