provider/dyn.go
func (d *dynProviderState) zones(client *dynect.Client) []string {
	return d.ZoneIDFilter.zoneIDs
}
func (d *dynProviderState) zones(client *dynect.Client) []string {
	return d.ZoneIDFilter.zoneIDs
}
// the zones we are allowed to touch. Currently only exact matches are considered, not all
// zones with the given suffix