javadoc can be given a list of classes, which can come from different pacakages.
If javadoc is given such a list of classes, it currently goes for the 2 frame
format, not the 3 frame one.

"It would be nice" (RFE) if the 3 frame format were used if the classes were
found to be in more than one package. I do not care that the listing of
the classes in each packages is incomplete (in the overall scheme) but it
would be nice to have the classes that *are* given, grouped according to package.