tweaks. increase m_desired_queue_size, maybe 2 is too low due to rounding

number of pieces to the nearest multiple of 8. not sure.

libtorrent/include/libtorrent/policy.hpp

@@ -95,7 +95,7 @@ namespace libtorrent
 	enum
 	{
 		// the limits of the download queue size
-		min_request_queue = 2,
+		min_request_queue = 8,
 
 		// the amount of free upload allowed before
 		// the peer is choked

libtorrent/src/bt_peer_connection.cpp

@@ -3105,6 +3105,9 @@ namespace libtorrent
 				if (i != p.end_peer())
 				{
 					TORRENT_ASSERT((*i)->connection->pid() == pid);
+#ifdef TORRENT_VERBOSE_LOGGING
+					peer_log("*** will disconnect: duplicated connection\n");
+#endif
 					// we found another connection with the same peer-id
 					// which connection should be closed in order to be
 					// sure that the other end closes the same connection?
@@ -3128,6 +3131,9 @@ namespace libtorrent
 			// since it most likely is ourself then
 			if (pid == m_ses.get_peer_id())
 			{
+#ifdef TORRENT_VERBOSE_LOGGING
+				peer_log("*** will disconnect: duplicated connection\n");
+#endif
 				if (peer_info_struct()) t->get_policy().ban_peer(peer_info_struct());
 				disconnect(errors::self_connection, 1);
 				return;

libtorrent/src/identify_client.cpp

@@ -216,6 +216,7 @@ namespace
 		, {"TR", "Transmission"}
 		, {"TS", "TorrentStorm"}
 		, {"TT", "TuoTu"}
+		, {"TW", "twister"}
 		, {"U",  "UPnP"}
 		, {"UL", "uLeecher"}
 		, {"UM", "uTorrent Mac"}

libtorrent/src/peer_connection.cpp

@@ -165,7 +165,7 @@ namespace libtorrent
 		, m_upload_rate_peak(0)
 		, m_rtt(0)
 		, m_prefer_whole_pieces(0)
-		, m_desired_queue_size(2)
+		, m_desired_queue_size(8)
 		, m_fast_reconnect(false)
 		, m_outgoing(outgoing)
 		, m_received_listen_port(false)

src/twister.cpp

@@ -155,9 +155,10 @@ void ThreadWaitExtIP()
     session_settings settings;
     // settings to test local connections
     settings.allow_multiple_connections_per_ip = true;
-    settings.enable_outgoing_utp = false; // test (netstat display)
+    //settings.enable_outgoing_utp = false; // (false to see connections in netstat)
     //settings.dht_announce_interval = 60; // test
     //settings.min_announce_interval = 60; // test
+    settings.anonymous_mode = false; // (false => send peer_id, avoid connecting to itself)
     ses->set_settings(settings);