Generic 301 re-direction

nginx.conf

    server {
      # just a random port
      listen 81;

      # why we have 2 different if checks? because www redirector block catches
      # all the requests, we should be more precise with the host

      # redirect http://kodingen.com to https://koding.com
      if ($host = "kodingen.com") {
        return 301 https://koding.com;
      }

      # redirect http://www.kodingen.com to https://koding.com
      if ($host = "www.kodingen.com") {
        return 301 https://koding.com;
      }

      # use generic names, do not hardcode values
      return 301 https://$host$request_uri;
    }