Mention new options

Doc/whatsnew/whatsnew25.tex

@@ -1206,6 +1206,11 @@ produce string representations of themselves, but are also callable.
 Newbies who try \code{quit()} or \code{exit()} will now exit the
 interpreter as they expect.  (Implemented by Georg Brandl.)
 
+The Python executable now accepts the standard long options 
+\longprogramopt{help} and \longprogramopt{version}; on Windows, 
+it also accepts the \programopt{/?} option for displaying a help message.
+(Implemented by Georg Brandl.)
+
 
 %======================================================================
 \subsection{Optimizations\label{opts}}