- remove unbound registration if lease expires (previously this was only written to disk, not supplied to unbound-control)
- when leases change, remove old fqdn's using unbound-control, this should mimic the current output in dhcpleases.conf more closely (if a manual registration was already there, it will be overwitten)
- log when entries are removed, eventually it might be better to lower the level a bit, but informal seems like a good starting point for now.
- switch to argparse for handling parameters
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