The introduction of the category RSS feed added a conflicting route.
This is the new route: `GET /rss/c/:storyType/:category`
This is the old route (lower precedence): `GET /rss/c/:storyType/:feedType`
The second type never gets called because the string `post-up` is treated as a category.
We resolved this by changing the feedType URL.
Old Video Post Up Feed URL Structure: https://www.theonion.com/rss/c/video/postup
New Video Post Up Feed URL Structure: https://www.avclub.com/rss/post-up/c/video
General URL Structure: /rss/:feedType/c/:storyType