Issue 1:
I cannot retrieve the docs for python-requests without using non-TLS http.

Expected Result

The following should return the page content at the end:

curl -L http://docs.python-requests.org/ -v

Actual Result

Instead, I get a TLS error:

curl -L http://docs.python-requests.org/ -v
* Trying 3.13.31.214...
* TCP_NODELAY set
* Connected to docs.python-requests.org (3.13.31.214) port 80 (#0)
> GET / HTTP/1.1
> Host: docs.python-requests.org
> User-Agent: curl/7.58.0
> Accept: */*
>
< HTTP/1.1 301 Moved Permanently
< Content-Type: text/html; charset=utf-8
< Location: https://2.python-requests.org/
< X-Redirector-Version: 2.6.0-4f37d77
< Date: Thu, 24 Oct 2019 13:48:03 GMT
< Content-Length: 65
< Connection: close
<
* Closing connection 0
* Issue another request to this URL: 'https://2.python-requests.org/'
* Trying 3.13.31.214...
* TCP_NODELAY set
* Connected to 2.python-requests.org (3.13.31.214) port 443 (#1)
* ALPN, offering h2
* ALPN, offering http/1.1
* successfully set certificate verify locations:
* CAfile: /etc/ssl/certs/ca-certificates.crt
CApath: /etc/ssl/certs
* TLSv1.3 (OUT), TLS handshake, Client hello (1):
* TLSv1.3 (IN), TLS alert, Server hello (2):
* error:14094438:SSL routines:ssl3_read_bytes:tlsv1 alert internal error
* stopped the pause stream!
* Closing connection 1
curl: (35) error:14094438:SSL routines:ssl3_read_bytes:tlsv1 alert internal error

Reproduction Steps

Run the above curl.

Issue 2:
The URL //2.python-requests.org/ (which is in the readme) automatically resolves to https://2.python-requests.org which is down (there is no HTTPS version of the site). The HTTP version of the site, http://2.python-requests.org, is fine.

Expected Result

I expect that when I click the link in the readme, it goes to a page that exists.

Actual Result

When I click the link in the readme, the // prefix resolves to https://, but there is no HTTPS version of 2.python-requests.org, so the page does not load.

Reproduction Steps

>>> import requests

>>> requests.get('https://2.python-requests.org/')
Traceback (most recent call last):
File "/Users/charles/.pyenv/versions/miniconda3-4.3.30/lib/python3.6/site-packages/urllib3/contrib/pyopenssl.py", line 472, in wrap_socket
cnx.do_handshake()
File "/Users/charles/.pyenv/versions/miniconda3-4.3.30/lib/python3.6/site-packages/OpenSSL/SSL.py", line 1716, in do_handshake
self._raise_ssl_error(self._ssl, result)
File "/Users/charles/.pyenv/versions/miniconda3-4.3.30/lib/python3.6/site-packages/OpenSSL/SSL.py", line 1456, in _raise_ssl_error
_raise_current_error()
File "/Users/charles/.pyenv/versions/miniconda3-4.3.30/lib/python3.6/site-packages/OpenSSL/_util.py", line 54, in exception_from_error_queue
raise exception_type(errors)
OpenSSL.SSL.Error: [('SSL routines', 'ssl3_read_bytes', 'tlsv1 alert internal error')]

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "/Users/charles/.pyenv/versions/miniconda3-4.3.30/lib/python3.6/site-packages/urllib3/connectionpool.py", line 603, in urlopen
chunked=chunked)
File "/Users/charles/.pyenv/versions/miniconda3-4.3.30/lib/python3.6/site-packages/urllib3/connectionpool.py", line 344, in _make_request
self._validate_conn(conn)
File "/Users/charles/.pyenv/versions/miniconda3-4.3.30/lib/python3.6/site-packages/urllib3/connectionpool.py", line 843, in _validate_conn
conn.connect()
File "/Users/charles/.pyenv/versions/miniconda3-4.3.30/lib/python3.6/site-packages/urllib3/connection.py", line 370, in connect
ssl_context=context)
File "/Users/charles/.pyenv/versions/miniconda3-4.3.30/lib/python3.6/site-packages/urllib3/util/ssl_.py", line 355, in ssl_wrap_socket
return context.wrap_socket(sock, server_hostname=server_hostname)
File "/Users/charles/.pyenv/versions/miniconda3-4.3.30/lib/python3.6/site-packages/urllib3/contrib/pyopenssl.py", line 478, in wrap_socket
raise ssl.SSLError('bad handshake: %r' % e)
ssl.SSLError: ("bad handshake: Error([('SSL routines', 'ssl3_read_bytes', 'tlsv1 alert internal error')],)",)

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "/Users/charles/.pyenv/versions/miniconda3-4.3.30/lib/python3.6/site-packages/requests/adapters.py", line 449, in send
timeout=timeout
File "/Users/charles/.pyenv/versions/miniconda3-4.3.30/lib/python3.6/site-packages/urllib3/connectionpool.py", line 641, in urlopen
_stacktrace=sys.exc_info()[2])
File "/Users/charles/.pyenv/versions/miniconda3-4.3.30/lib/python3.6/site-packages/urllib3/util/retry.py", line 399, in increment
raise MaxRetryError(_pool, url, error or ResponseError(cause))
urllib3.exceptions.MaxRetryError: HTTPSConnectionPool(host='2.python-requests.org', port=443): Max retries exceeded with url: / (Caused by SSLError(SSLError("bad handshake: Error([('SSL routines', 'ssl3_read_bytes', 'tlsv1 alert internal error')],)",),))

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/Users/charles/.pyenv/versions/miniconda3-4.3.30/lib/python3.6/site-packages/requests/api.py", line 75, in get
return request('get', url, params=params, **kwargs)
File "/Users/charles/.pyenv/versions/miniconda3-4.3.30/lib/python3.6/site-packages/requests/api.py", line 60, in request
return session.request(method=method, url=url, **kwargs)
File "/Users/charles/.pyenv/versions/miniconda3-4.3.30/lib/python3.6/site-packages/requests/sessions.py", line 533, in request
resp = self.send(prep, **send_kwargs)
File "/Users/charles/.pyenv/versions/miniconda3-4.3.30/lib/python3.6/site-packages/requests/sessions.py", line 646, in send
r = adapter.send(request, **kwargs)
File "/Users/charles/.pyenv/versions/miniconda3-4.3.30/lib/python3.6/site-packages/requests/adapters.py", line 514, in send
raise SSLError(e, request=request)
requests.exceptions.SSLError: HTTPSConnectionPool(host='2.python-requests.org', port=443): Max retries exceeded with url: / (Caused by SSLError(SSLError("bad handshake: Error([('SSL routines', 'ssl3_read_bytes', 'tlsv1 alert internal error')],)",),))

>>> requests.get('http://2.python-requests.org/')
<Response [200]>

System Information

N/A