allow DHT tracker to report untested peers in case we are short of "known good" ones (recently connected).

this change permit some peers from resume file to be reported right away, without waiting torrent to unpause.

libtorrent/src/torrent.cpp

@@ -2083,19 +2083,24 @@ namespace libtorrent
 
 		//TORRENT_ASSERT(m_allow_peers);
 
-		// [MF] use m_dht->announce with myself=false to update dht tracker with peers we know
-		{
+		// [MF] use m_dht->announce with myself=false to update dht tracker with peers we know.
+		// in case we are short of "known good" peers (recently connected), in second pass we report the others.
+		int minPeersToAnnounce = 10;
+		for(int pass = 0; pass < 2 && minPeersToAnnounce > 0; pass++) {
 			policy::const_iterator i = get_policy().begin_peer();
 			policy::const_iterator end = get_policy().end_peer();
-			for (; i != end; ++i) {
+			for (; i != end && (!pass || minPeersToAnnounce > 0); ++i) {
 				policy::peer const* p = *i;
 
-				bool connect_recently = !p->banned && int(p->failcount) < settings().max_failcount &&
-						p->last_connected && (m_ses.session_time() - p->last_connected) < (4*3600);
-				if( p->connectable && ( p->connection || connect_recently) ) {
+				if( !p->banned && int(p->failcount) < settings().max_failcount ) {
+					bool connect_recently = !p->failcount && p->last_connected &&
+								(m_ses.session_time() - p->last_connected) < (4*3600);
+					if( p->connectable && (p->connection || connect_recently || pass) ) {
 						m_ses.m_dht->announce(name(), m_torrent_file->info_hash()
 						  , p->address(), p->port, p->seed, false, m_policy.num_peers()
 						  , boost::bind(&nop));
+						minPeersToAnnounce--;
+					}
 				}
 			}
 		}