A few adjustments to prioritized peers usage

client.go

@@ -943,7 +943,7 @@ func (cl *Client) newTorrent(ih metainfo.Hash, specStorage storage.ClientImpl) (
 		cl:       cl,
 		infoHash: ih,
 		peers: prioritizedPeers{
-			om: btree.New(2),
+			om: btree.New(32),
 			getPrio: func(p Peer) peerPriority {
 				return bep40PriorityIgnoreError(cl.publicAddr(p.IP), p.addr())
 			},

torrent.go

@@ -258,8 +258,10 @@ func (t *Torrent) addPeer(p Peer) {
 	}
 	t.openNewConns()
 	for t.peers.Len() > cl.config.TorrentPeersHighWater {
-		t.peers.DeleteMin()
-		torrent.Add("peers discarded", 1)
+		_, ok := t.peers.DeleteMin()
+		if ok {
+			torrent.Add("excess reserve peers discarded", 1)
+		}
 	}
 }