add missing conf files

dns-ad-blocker/config/custom.conf

@@ -0,0 +1,12 @@
+server=/google.cn/
+server=/securepubads.g.doubleclick.net/
+server=/adservice.google.com/
+server=/www.googleadservices.com/
+
+#server=/googlevideo.com/ # r3---sn-5hne6nsk.
+
+#server=/herderin.veenboer.xyz/192.168.2.193
+#address=/herderin.veenboer.xyz/192.168.2.193
+
+# Custom hosts
+addn-hosts=/etc/dnsmasq.hosts