Fix dns_pdns.sh to use saved account conf

dnsapi/dns_pdns.sh

@@ -1,4 +1,4 @@
-#!/usr/bin/bash
+#!/usr/bin/env sh
 # shellcheck disable=SC2034
 dns_pdns_info='PowerDNS Server API
 Site: PowerDNS.com
@@ -10,7 +10,6 @@ Options:
  PDNS_Ttl=60 Domain TTL. Default: "60".
 '
 
-
 DEFAULT_PDNS_TTL=60
 
 ########  Public functions #####################