Merge PRs #1, #2, jhs#3

Fix %pXbUQg/kZJGH13GaxApbVcAwf5iYgeZ6AglQH8FPjt8=.sha256

 jhs#5 is not completely correct or necessary so is not merged.

Author: cel

convenient.js

@@ -4,7 +4,7 @@
 
 require('defaultable')(module,
   { 'convenient'    : true
-  , 'ttl'           : 3600
+  , 'ttl'           : 10
   }, function(module, exports, DEFS, require) {
 
 function noop() {}
@@ -85,12 +85,6 @@ function final_response(res, value) {
 
   function well_formed_record(record) {
     record.class = record.class || 'IN'
-
-    var zone_minimum = DEFS.ttl
-    if(soa_record)
-      zone_minimum = soa_record.data.ttl
-
-    record.ttl = Math.max(record.ttl || 0, zone_minimum)
   }
 }
 

encode.js

@@ -217,7 +217,7 @@ State.prototype.encode = function(full_domain, position_offset, option) {
     , bytes
 
   var i = 0
-  var max_iterations = 40 // Enough for 1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.ip6.arpa
+  var max_iterations = 127 // Theoretical upper limit for number of labels in a DNS name; see https://en.wikipedia.org/wiki/Subdomain#Overview
 
   while(++i < max_iterations) {
     if(domain == '') {

server.js

@@ -221,7 +221,7 @@ Response.prototype.end = function(value) {
   var self = this
 
   var msg = convenient.final_response(self, value)
-    , data = msg.toBinary()
+    , data = msg ? msg.toBinary() : self.toBinary()
 
   if(udp4Or6(self.connection.type)&& data.length > 512)
     return self.emit('error', 'UDP responses greater than 512 bytes not yet implemented')