Add bind9 and replace pdns

data/conf/bind9/named.conf

@@ -0,0 +1,20 @@
+acl internal_networks {
+        127.0.0.0/8;
+        192.168.0.0/16;
+        172.16.0.0/12;
+        10.0.0.0/8;
+};
+
+options {
+        directory "/var/cache/bind";
+        allow-recursion { internal_networks; };
+        listen-on { any; };
+        listen-on-v6 { none; };
+        pid-file "/var/run/named/named.pid";
+        allow-transfer { none; };
+        dnssec-enable yes;
+        dnssec-validation yes;
+        dnssec-lookaside auto;
+};
+
+include "/etc/bind/bind.keys";