Add UDP forwarding from Nginx

This is working locally, I can resolve addresses. But there still
seems to be another problem in that Windows is timing out when setting
the Pi as the DNS server.

roles/pi-hole/files/dns_foward.conf

@@ -0,0 +1,7 @@
+stream {
+     server {
+         listen 53 udp;
+         proxy_pass 127.0.0.1:5053;
+         proxy_responses 0;
+     }
+ }