enforce max gap limit on v3

lib/expressapp.js

@@ -280,7 +280,19 @@ ExpressApp.prototype.start = function(opts, cb) {
     });
   });
 
+  // DEPRECATED
   router.post('/v2/addresses/', function(req, res) {
+    getServerWithAuth(req, res, function(server) {
+      server.createAddress({
+        ignoreMaxGap: true
+      }, function(err, address) {
+        if (err) return returnError(err, res, req);
+        res.json(address);
+      });
+    });
+  });
+
+  router.post('/v3/addresses/', function(req, res) {
     getServerWithAuth(req, res, function(server) {
       server.createAddress(req.body, function(err, address) {
         if (err) return returnError(err, res, req);