pool: graceful disconnect - simpler approach

lib/net/pool.js

@@ -352,9 +352,10 @@ Pool.prototype._disconnect = co(function* disconnect() {
     item.resolve();
   }
 
-  this.peers.destroy();
+  // prevent peer list from trying to refill
+  this.disconnecting = true;
 
-  this.nonces = new NonceList();
+  this.peers.destroy();
 
   this.requestMap.reset();
 
@@ -376,6 +377,7 @@ Pool.prototype._disconnect = co(function* disconnect() {
 
   yield this.unlisten();
 
+  this.disconnecting = false;
   this.syncing = false;
   this.connected = false;
 });
@@ -1154,7 +1156,8 @@ Pool.prototype.handleClose = co(function* handleClose(peer, connected) {
   if (!outbound)
     return;
 
-  this.refill();
+  if(!this.disconnecting)
+    this.refill();
 });
 
 /**
@@ -3722,22 +3725,10 @@ PeerList.prototype.has = function has(hostname) {
 PeerList.prototype.destroy = function destroy() {
   var peer, next;
 
-  this.map = {};
-  this.load = null;
-  this.inbound = 0;
-  this.outbound = 0;
-
   for (peer = this.list.head; peer; peer = next) {
     next = peer.next;
-
-    // stop processing peer events
-    peer.onPacket = null;
-    peer.removeAllListeners()
-
     peer.destroy();
   }
-
-  this.list = new List();
 };
 
 /**