Adds a short preview text (with <a title="...">) to every link of
a page. This however requires multiple additonal database accesses
(slower) and could enlarge delivered .html page sizes dramatically.
prev << "linking/linkexcerpts"
next >> "linking/linkdatabase"

You cannot modify the README.plugins file, but anyhow any ideas or suggestion should as usually get filed on BugReports, UserSuggestions or even better the README.plugins.Discussion.