Thanks, John, for improving link functionality in org-mode!

I just discovered that this change breaks the contrib files that use
org-store-link-functions and org-add-link-type.

I'm not familiar enough with the details of org-link-set-parameters to
fix all of the contrib files, but I am including a simple patch to
update a contrib file that I use regularly: org-eww.el.

Thanks,
Matt