count lease expiration threshold

Destination.cpp

@@ -198,7 +198,7 @@ namespace client
 		else
 		{	
 			auto ls = i2p::data::netdb.FindLeaseSet (ident);
-			if (ls)
+			if (ls && !ls->IsExpired ())
 			{
 				ls->PopulateLeases (); // since we don't store them in netdb
 				m_RemoteLeaseSets[ident] = ls;			

Streaming.cpp

@@ -621,7 +621,7 @@ namespace stream
 		auto ts = i2p::util::GetMillisecondsSinceEpoch ();		
 		if (!m_CurrentRemoteLease || ts >= m_CurrentRemoteLease->endDate - i2p::tunnel::TUNNEL_EXPIRATION_THRESHOLD*1000)
 			UpdateCurrentRemoteLease (true);
-		if (m_CurrentRemoteLease && ts < m_CurrentRemoteLease->endDate)
+		if (m_CurrentRemoteLease && ts < m_CurrentRemoteLease->endDate + i2p::data::LEASE_ENDDATE_THRESHOLD)
 		{	
 			std::vector<i2p::tunnel::TunnelMessageBlock> msgs;
 			for (auto it: packets)