Attempts to shorten a link into the Toolbox permalink format for usernotes. This format is described here: https://github.com/toolbox-team/reddit-moderator-toolbox/wiki/Subreddit-Wikis%3A-usernotes#link-string-formats
The link to shorten
A shortened link string, or the original URL if the link doesn't match any shortening format known to Toolbox.
Attempts to shorten a link into the Toolbox permalink format for usernotes. This format is described here: https://github.com/toolbox-team/reddit-moderator-toolbox/wiki/Subreddit-Wikis%3A-usernotes#link-string-formats