Fatal error: Trying to set unknown parameter 'default-soa-mail'

[timschneider]

Remove the following lines from the helm chart template to fix the problem.

https://github.com/aescanero/helm-charts/blob/76fcfc3de2db248acaa73c9a1c7572c19bf96504/charts/powerdns/templates/powerdns-deployment.yaml#L70-L75

This is related to the following issue of the underlaying docker image. https://github.com/pschiffe/docker-pdns/issues/50