added disableSeeding option for torrent

lib/torrent.js

@@ -65,6 +65,8 @@ function Torrent (torrentId, opts) {
   self.path = opts.path
   self._store = opts.store || FSChunkStore
 
+  self.disableSeeding = opts.disableSeeding || true
+
   self.strategy = opts.strategy || 'sequential'
 
   self._rechokeNumSlots = (opts.uploads === false || opts.uploads === 0)
@@ -275,7 +277,7 @@ Torrent.prototype._processParsedTorrent = function (parsedTorrent) {
     })
   }
 
-  if (this.urlList) {
+  if (this.urlList && !this.disableSeeding) {
     // Allow specifying web seeds via `opts` parameter
     parsedTorrent.urlList = parsedTorrent.urlList.concat(this.urlList)
   }
@@ -377,7 +379,7 @@ Torrent.prototype._onMetadata = function (metadata) {
   self.discovery.setTorrent(self)
 
   // add web seed urls (BEP19)
-  if (self.urlList) self.urlList.forEach(self.addWebSeed.bind(self))
+  if (self.urlList && !self.disableSeeding) self.urlList.forEach(self.addWebSeed.bind(self))
 
   if (!self.resumed) {
     self._hashes = self.pieces