text: Title: Documentation overhaul (for clarity)
  Body: - People sometimes get confused by our `curl` commands, and there is also an inconsistency between placeholders in URL and non-URL (`:name` vs. `{token}`). Let's use braces style (consistent with OpenAPI)
  - Under Windows, `curl` apparently works like this (cf. email to me on 2020-04-04):
    ```
      echo {"email": "youremailaddress@example.com", "password": "yourpassword"} | curl -X POST https://desec.io/api/v1/auth/login/ --header "Content-Type: application/json" --data @- 
    ```
    The user also sent a step-by-step instruction for Windows on 2020-04-07. Consider incorporating it somewhere.
  - replace `password='[password]'` with `password='[TOKEN]'` to https://desec.readthedocs.io/en/latest/dyndns/configure.html#option-2-use-ddclient, and add "To get the Token: Login with your credentials defined in the registration process."