https://github.com/zalando/postgres-operator/blob/b9ef88f842f4776c737f31fe369b4fe7fa995cdf/manifests/configmap.yaml#L63 and https://github.com/zalando/postgres-operator/blob/b9ef88f842f4776c737f31fe369b4fe7fa995cdf/manifests/configmap.yaml#L119 should be configurable.
