Add support for NAT traversal techniques

lib/torrent.js

@@ -72,6 +72,7 @@ function Torrent (torrentId, client, opts) {
 
   this.announce = opts.announce
   this.urlList = opts.urlList
+  this.discoveryIntervalMs = opts.discoveryIntervalMs
 
   this.path = opts.path
   this.skipVerify = !!opts.skipVerify
@@ -339,7 +340,8 @@ Torrent.prototype._onListening = function () {
     dht: !self.private && self.client.dht,
     tracker: trackerOpts,
     port: self.client.torrentPort,
-    userAgent: USER_AGENT
+    userAgent: USER_AGENT,
+    intervalMs: self.discoveryIntervalMs
   })
 
   self.discovery.on('error', onError)