Add Twitch Spade

Twitch disguises requests to their tracking system under a hostname that resembles the one they use when serving video to the users. They employ a scheduled job to rotate the prefix periodically (the `video-edge-41c9a6.pdx01` part), but it always resolves to the CNAME `spade.sci.twitch.tv`. This was once directly served over `spade.twitch.tv`, but after it was added to common ad filter lists, Twitch resorted to this way of enabling user tracking.

```bash
$ dig +short video-edge-41c9a6.pdx01.abs.hls.ttvnw.net # Fake video edge used to track events
spade.sci.twitch.tv.
science-edge-external-prod-73889260.us-west-2.elb.amazonaws.com.
52.10.9.205
34.210.146.165
52.41.114.21
52.34.161.102
52.33.93.28
52.41.142.156
54.69.146.250
34.214.200.59
$ dig +short video-edge-65ed1e.vie02.abs.hls.ttvnw.net # Original video edge
99.181.68.239
```