withOpenSSL not present anymore

Examples mention this code:

```
import OpenSSL.Session (context)
import Network.HTTP.Client.OpenSSL

let opts = defaults & manager .~ Left (opensslManagerSettings context)
withOpenSSL $
  getWith opts "https://httpbin.org/get"
```

at http://hackage.haskell.org/package/wreq-0.5.3.2/docs/Network-Wreq.html

But there is no `Network.HTTP.Client.OpenSSL`, nor a `withOpenSSL` function.