Disabling gravatar does not disable all instances of it
Created by: ssandler
Setting gravatar.enabled to false in the config does disable some of the gravatar links on pages, such as the links on a user's profile page, the user's own link at the top right, etc. However the gravatar links still show up in other places like a project's activity log.
This seems to be due to the fact that app/assets/javascripts/users_select.js.coffee does not check to see whether gravatar is enabled before writing out gravatar links.