To run zfSnap periodically you can add these options to your
	/etc/periodic.conf

	xPERIODICx_zfsnap_enable	- Enable xPERIODICx snapshots
					  (values: YES | NO)
	xPERIODICx_zfsnap_fs		- Space separated zfs filesystems
					  to create non-recursive snapshots
	xPERIODICx_zfsnap_recursive_fs	- Space separated zfs filesystems
					  to create recursive snapshots
	xPERIODICx_zfsnap_ttl		- Set Time To Live
	xPERIODICx_zfsnap_verbose	- Verbose output (values: YES | NO)
	xPERIODICx_zfsnap_flags		- zfSnap generic flags
					  (except -v and -d)
	xPERIODICx_zfsnap_enable_prefix - Create snapshots with prefix
					  (Default = YES)
	xPERIODICx_zfsnap_prefix	- Set prefix to use for new snapshots
					  (Default = "xPERIODICx-")
	(where xPERIODICx is any of hourly, daily, weekly, monthly, reboot)

	xPERIODICx_zfsnap_delete_enable    - Delete old snapshots periodically
					     (values: YES | NO)
	xPERIODICx_zfsnap_delete_flags	   - zfSnap generic flags
					     (except -v and -d)
	xPERIODICx_zfsnap_delete_verbose   - Verbose output (values: YES | NO)
	xPERIODICx_zfsnap_delete_prefixes  - Space separated list of prefixes
					     of old zfSnap snapshots to delete
					     'hourly-', 'daily-', 'weekly-',
					     'monthly-' and 'reboot-' prefixes
					     are hard-coded
	(where xPERIODICx is any of daily, weekly, monthly)


	Add these lines to your /etc/crontab
	4	*	*	*	*	root	periodic hourly
	@reboot					root	periodic reboot

	NOTE: it is not recommended to delete zfSnap snapshots every hour.
	Deleting zfs snapshots takes more time than creating them.
	There for it's better to delete snapshots once per day...


	Periodic scripts provide very limited feature set. If you want to use
	more advanced setup, you need to call zfSnap from crontab directly.
	This way you can combine all sort of parameter combinations.

	Don't forget to check https://github.com/graudeejs/zfSnap/wiki for more
	info.

	Feedback welcomed: graudeejs@gmail.com