removed unneeded invariant checks, fixed disconnect message priority

libethereum/BlockChainSync.cpp

@@ -92,7 +92,6 @@ void BlockChainSync::onPeerStatus(std::shared_ptr<EthereumPeer> _peer)
 		_peer->m_expectedHashes = hashes;
 		onNewPeer(_peer);
 	}
-	DEV_INVARIANT_CHECK;
 }
 
 unsigned BlockChainSync::estimatedHashes() const
@@ -293,7 +292,6 @@ void BlockChainSync::onPeerNewBlock(std::shared_ptr<EthereumPeer> _peer, RLP con
 		DEV_GUARDED(_peer->x_knownBlocks)
 			_peer->m_knownBlocks.insert(h);
 	}
-	DEV_INVARIANT_CHECK;
 }
 
 PV60Sync::PV60Sync(EthereumHost& _host):

libp2p/Session.cpp

@@ -315,7 +315,7 @@ void Session::drop(DisconnectReason _reason)
 	if (socket.is_open())
 		try
 		{
-			clog(NetWarn) << "Closing " << socket.remote_endpoint() << "(" << reasonOf(_reason) << ")";
+			clog(NetConnect) << "Closing " << socket.remote_endpoint() << "(" << reasonOf(_reason) << ")";
 			boost::system::error_code ec;
 			socket.shutdown(boost::asio::ip::tcp::socket::shutdown_both, ec);
 			socket.close();