Self-signed certs not working for Netty, when they are for Jetty.

To reproduce, take the getting-started app, change the port to say 8089, launch, and either of these will show the problem:

```
wget --no-check-certificate https://localhost:8999/
curl -k https://localhost:8999/
```

Workaround: use jooby-jetty not jooby-netty as the dep in the POM.