clarify (kinda) vanity nameserver comment

lib/dns-store.js

@@ -407,6 +407,9 @@ module.exports.query = function (input, query, cb) {
       console.log("It's NS");
 
       // If it's a vanity NS, it's not a valid NS for lookup
+      // NOTE: I think that the issue here is EXTERNAL vs INTERNAL vanity NS
+      // We _should_ reply for EXTERNAL vanity NS... but not when it's listed on the SOA internally?
+      // It's surrounding the problem of what if I do sub domain delegation to the same server.
       if (-1 === db.primaryNameservers.indexOf(r.data.toLowerCase())) {
         console.log("It's a vanity NS");
         return false;