[Pdns-users] Automatically delete zones that are deleted on Supermaster

[powerdns.com at virtualskill.de]

Hey guys,
I'm running a PowerDNS setup with some Supermasters. This is a great 
feature and does work as it should. The problem is, that I cannot find a 
way to automatically delete a zone on PowerDNS when it is deleted on 
Supermaster.

PowerDNS gets notified when zone is deleted on Supermaster. PowerDNS log:
----------------------------
1 slave domain needs checking, 0 queued for AXFR
While checking domain freshness: Query to 'xx.xx.xx.xx' for SOA of 
'domain.tld' produced no results
Received serial number updates for 0 zones
----------------------------

How to get PowerDNS to delete zones that are deleted on a Supermasters?

Thanks for any help.