Remove obsolete content_lang comment.
Move get_promote_srid to Subreddit classmethod.
Store popular subreddits in NamedGlobals.
Use data in NamedGlobals for random_reddit.
inventory: Use the correct variable when reducing targets.
GET_check_inventory: don't allow collection + location.
POST_edit_campaign: Fix target error checks.
POST_edit_campaign: prevent location targeting a collection.