text: Title: Explain the status and the future of the library (in PR template, README, docs site)
  Body: Attempting to file a new feature request shows the text:
  
  > Requests is not accepting feature requests at this time.
  
  Fair enough, there must be reason for that (e.g. lack of maintainers).
  
  However, maybe explain a bit more - if new features are not accepted, what is the future of the library in general? You could:
  
  - Pin a ticket on the issue tracker
  - Add a note to the README
  - And/or maybe to the docs site
  
  Current state leaves people (at least me) searching/googling for the status and explanation, yet nothing is found?