limit number of incoming streams. don't request LeaseSet for incoming stream

libi2pd/Streaming.h

@@ -66,6 +66,7 @@ namespace stream
 	const int MIN_SEND_ACK_TIMEOUT = 2; // in milliseconds
 	const int SYN_TIMEOUT = 200; // how long we wait for SYN after follow-on, in milliseconds
 	const size_t MAX_PENDING_INCOMING_BACKLOG = 1024;
+	const size_t MAX_NUM_INCOMING_STREAMS = 2048;
 	const int PENDING_INCOMING_TIMEOUT = 10; // in seconds
 	const int MAX_RECEIVE_TIMEOUT = 20; // in seconds
 	const uint16_t DELAY_CHOKING = 60000; // in milliseconds
@@ -262,6 +263,7 @@ namespace stream
 			int32_t m_PreviousReceivedSequenceNumber;
 			int32_t m_LastConfirmedReceivedSequenceNumber; // for limit inbound speed
 			StreamStatus m_Status;
+			bool m_IsIncoming;
 			bool m_IsAckSendScheduled;
 			bool m_IsNAcked;
 			bool m_IsFirstACK;