Add rules for WebPlatform.org

I used the CN + SANs in their current certificate and then tested each manually.

```bash
$ getcertnames docs.webplatform.org
Testing docs.webplatform.org…

Common Name:

www1.webplatform.org

Subject Alternative Name(s):

www1.webplatform.org
webplatform.org
www.webplatform.org
talk.webplatform.org
blog.webplatform.org
docs.webplatform.org
code.webplatform.org
result.webplatform.org
preview.webplatform.org
project.webplatform.org
stats.webplatform.org
static.webplatform.org
source.webplatform.org
```