mkdynamic/omniauth-facebook — pull request #13 by gumayunov (2011-12-01 17:49:20+00:00)
Title: Add callback_url option

Sometimes we need to pass callback url to match FB application security configuration.

```ruby
provider :facebook, cfg['app_id'], cfg['app_secret'], {
:authorize_options => { :callback_url => cfg['callback_url'] }
}
```