Shorter connect timeout for TCP peers

This restores the older timeout for TCP peers, which was originally
increased as a workaround to give enough time for WebRTC peers.

Supersedes https://github.com/feross/bittorrent-swarm/pull/21

lib/peer.js

@@ -3,7 +3,8 @@ var Wire = require('bittorrent-protocol')
 
 var WebConn = require('./webconn')
 
-var CONNECT_TIMEOUT = 25000
+var CONNECT_TIMEOUT_TCP = 25000
+var CONNECT_TIMEOUT_WEBRTC = 5000
 var HANDSHAKE_TIMEOUT = 25000
 
 /**
@@ -206,7 +207,7 @@ Peer.prototype.startConnectTimeout = function () {
   clearTimeout(self.connectTimeout)
   self.connectTimeout = setTimeout(function () {
     self.destroy(new Error('connect timeout'))
-  }, CONNECT_TIMEOUT)
+  }, self.type === 'webrtc' ? CONNECT_TIMEOUT_WEBRTC : CONNECT_TIMEOUT_TCP)
   if (self.connectTimeout.unref) self.connectTimeout.unref()
 }