Regularly update the list of URL shorteners

[pushcx]

Lobsters blocks URL shorteners like t.co and bit.ly because they create dupe posts and generate good traffic data for marketers. This used to be a hardcoded constant called TRACKING_DOMAINS that was irregularly updated; that was folded into the general-purpose domain banning feature in #1080.

I saw a story about frustrations growing a link shortener (via) and the author mentioned maintaining a list of shorteners.

I'd like to use this list (and/or another, if others exist?) to replace our use of the domain banning feature, which requires manual intervention, doesn't provide a convenient list of blocked shorteners, and has the slightly odd step of creating a Domain record we haven't ever had a link to in order to ban it.

Updating our copy of the list could added to our daily cron job.