API could be consistent about the meaning of bool values.

The source has the following json keys defined and the comment indicating their meaning.

```
`json:"ephemeral_keys_supported"`             // good if true
`json:"session_ticket_supported"`             // good if true
`json:"tls_compression_supported"`            // bad if true
`json:"unknown_cipher_suite_supported"`       // bad if true
`json:"beast_vuln"`                           // bad if true
```

It would be nice if the API were more consistent about `true` being good.

For example instead of `"beast_vuln": false` it could be `"mitigates_beast": true`, and `"tls_compression_disabled": true` instead of `"tls_compression_supported": true`.