title: Python urllib3 too many redirects
body: <p>I learn Python now and I want to create simple tool to opening few sites. I have next code:</p>
  
  <pre class="lang-python prettyprint-override"><code>#!/usr/bin/python
  import urllib3, ssl, certifi
  from urllib3 import Retry, Timeout
  
  def openurl(url, method = "get"):
      retries = Retry(connect=500, read=2, redirect=500)
      http = urllib3.PoolManager(
          cert_reqs = 'CERT_REQUIRED',
          ca_certs = certifi.where(),
          retries = retries
      )
      con = urllib3.connection_from_url(url)
      r = con.request(method, '/trades');
  
  openurl("http://www.steamgifts.com")
  </code></pre>
  
  <p>But on this site script returns <code>Caused by ResponseError('too many redirects',)</code></p>
  
  <p>I try to fix this by <code>Retry(connect=500, read=2, redirect=500)</code> but I don't see changes.</p>