discourse/discourse — pull request #2260 by riking (2014-04-11 22:34:44+00:00)
Title: Add site setting for domains to never download images from

Suggested by https://meta.discourse.org/t/how-are-local-copies-of-remote-images-made/14693/5?u=riking

Example value for the site setting:

i.imgur.com|\w+.ytimg.com