threadedRead now const uchar *

pipacketextractor Header mode now more flexible
fix splitTime mode
more refactoring
add virtual override to functions
remove piforeach
replace 0 to nullptr
iterate over pimap via iterators
replace CONNECTU to CONNECT# with compile time check

libs/main/io_utils/pibroadcast.h

@@ -133,7 +133,7 @@ protected:
 	virtual void addressesChanged() {}
 
 private:
-	EVENT_HANDLER2(void, mcastRead, uchar * , data, int, size);
+	EVENT_HANDLER2(void, mcastRead, const uchar * , data, int, size);
 	void destroyAll();
 	void initAll(PIVector<PIEthernet::Address> al);
 	void run();