Block cache WIP and other fixes

- Block cache is implemented only on Windows for now
- Tracking of background jobs
- More robust sidechain syncing

src/log.h

@@ -98,6 +98,8 @@ struct Stream
 	FORCEINLINE int getNumberWidth() const { return m_numberWidth; }
 	FORCEINLINE void setNumberWidth(int width) { m_numberWidth = width; }
 
+	NOINLINE void writeCurrentTime();
+
 	int m_pos;
 	int m_numberWidth;
 	char* m_buf;