old_contents: import http.client
  
  conn = http.client.HTTPConnection("mockbin.com")
  
  headers = { 'cookie': "foo=bar; bar=baz" }
  
  conn.request("POST", "/har", headers = headers)
  
  res = conn.getresponse()
  data = res.read()
  
  print(data.decode("utf-8"))
  
new_contents: import http.client
  
  conn = http.client.HTTPConnection("mockbin.com")
  
  headers = { 'cookie': "foo=bar; bar=baz" }
  
  conn.request("POST", "/har", headers=headers)
  
  res = conn.getresponse()
  data = res.read()
  
  print(data.decode("utf-8"))
  
subject: Update cookies.py