use SendBufferQueue for queued messages from I2P

libi2pd/Streaming.h

@@ -111,6 +111,11 @@ namespace stream
 			buf = new uint8_t[len];
 			memcpy (buf, b, len);
 		}
+		SendBuffer (size_t l): // creat empty buffer
+			len(l), offset (0)	
+		{
+			buf = new uint8_t[len];
+		}	
 		~SendBuffer ()
 		{
 			delete[] buf;
@@ -129,6 +134,7 @@ namespace stream
 			~SendBufferQueue () { CleanUp (); };
 
 			void Add (const uint8_t * buf, size_t len, SendHandler handler);
+			void Add (std::shared_ptr<SendBuffer> buf);
 			size_t Get (uint8_t * buf, size_t len);
 			size_t GetSize () const { return m_Size; };
 			bool IsEmpty () const { return m_Buffers.empty (); };