github/developer.github.com — Issue #40: "follow" and "gist" events seem to be able to subscribed to for repositories. 
Author: halorgium
Created: 2011-12-19 22:15:36+00:00
State: open

I'm not sure these are meant to be allowed.

```
% curl -v -H "Authorization: token $GITHUB_API_TOKEN" -F 'hub.mode=subscribe' -F 'hub.topic=https://github.com/halorgium/hax/events/gist' -F 'hub.callback=http://spork.in/github' https://api.github.com/hub

% curl -s -H "Authorization: token $GITHUB_API_TOKEN" https://api.github.com/repos/halorgium/hax/hooks/134241
{
"active": true,
"events": [
"gist"
],
"created_at": "2011-12-19T22:12:28Z",
"name": "web",
"updated_at": "2011-12-19T22:12:28Z",
"last_response": {
"message": null,
"code": null
},
"config": {
"content_type": "form",
"url": "http://spork.in/github",
"secret": null
},
"id": 134241,
"url": "https://api.github.com/repos/halorgium/hax/hooks/134241"
}