Add sorting by protocol to get_peers function

-Small change to help sort the peers list a bit better when filtering ports so that lower protocols drop off the list if there are multiple connections from the same ip with different protocols

lib/database.js

@@ -1125,7 +1125,7 @@ module.exports = {
   },
 
   get_peers: function(cb) {
-    Peers.find().sort({address: 1, port: 1}).exec(function (err, peers) {
+    Peers.find().sort({address: 1, protocol: -1, port: 1}).exec(function (err, peers) {
       if (err)
         return cb([]);
       else