Storing all of env on parseRequest() is really noisy

It's probably not wise to send all of ENV since it can contain secure information.

We should probably only send what's actually needed.
Instead of making this hard coded, thoughts on making it a list of keys we allow with the default of `REMOTE_ADDR`?

```js
var envInfo = {};
var envKeys = optionsFromSomewhere || module.exports.WHITELISTED_ENV_KEYS = ['REMOTE_ADDR'];
envKeys.forEach(function addEnvItem (key) {
  envInfo[key] = process.env[key];
});
// or use _.pick(process.env, 'envKeys');
```