• No longer flushes cache when changing role/permission assignments to users because user cache is in-memory. #1832
  (It now only flushes when changing permissions-assigned-to-roles, or roles-assigned-to-permissions.)
  NOTE: You should test your app to be sure that you don't accidentally have deep dependencies on cache resets happening automatically in these cases.
  ALSO NOTE: If you have added custom code which depended on these flush operations, you may need to add your own cache-reset calls.