RFR: 8164408: Add module support for @see, @link and @linkplain javadoc tags.

[Hannes Wallnoefer]

Thanks for the review, Jon.

> Am 29.05.2020 um 19:03 schrieb Jonathan Gibbons <jonathan.gibbons at oracle.com>:
> 
> 
> I think the proposed behavior, that 'foo.bar' resolves in favor of a type or package, is OK, and favors backwards compatibility, which is good, although it would not be my first choice if we were starting over from scratch in an alternate reality.
> 
> In DocCommentParser, why do you go out of your way to store the `trimmedSig` in the tree, and not the sig as found? Does this affect the source-fidelity when printing out the tree?
> 

The trailing slash is only needed to disambiguate the intention, but it needs to be removed in order for the module lookup to succeed.

Hannes


> -- Jon
>