3.4.0 breaks connecting with connection URL

[jbasko]

Version: 3.4.0

Platform: Python 3.7.5, OS X and Linux

Description:
This code:

import os

import redis

r = redis.StrictRedis.from_url(os.environ["REDIS_URL"])
print("set key1 123")
print(r.set('key1', '123'))
print("get key1")
print(r.get('key1'))

raises:

set key1 123
Traceback (most recent call last):
  File "scripts/test_redis.py", line 8, in <module>
    print(r.set('key1', '123'))
  File "~/.pyenv/versions/skdb/lib/python3.7/site-packages/redis/client.py", line 1772, in set
    return self.execute_command('SET', *pieces)
  File "~/.pyenv/versions/skdb/lib/python3.7/site-packages/redis/client.py", line 881, in execute_command
    conn = self.connection or pool.get_connection(command_name, **options)
  File "~/.pyenv/versions/skdb/lib/python3.7/site-packages/redis/connection.py", line 1178, in get_connection
    connection.connect()
  File "~/.pyenv/versions/skdb/lib/python3.7/site-packages/redis/connection.py", line 559, in connect
    self.on_connect()
  File "~/.pyenv/versions/skdb/lib/python3.7/site-packages/redis/connection.py", line 633, in on_connect
    if nativestr(self.read_response()) != 'OK':
  File "~/.pyenv/versions/skdb/lib/python3.7/site-packages/redis/connection.py", line 739, in read_response
    raise response
redis.exceptions.ResponseError: wrong number of arguments for 'auth' command

The connection URL is like the ones used on Heroku:
redis://h:[email protected]:12345

Doesn't happen with 3.3.11

[zyv]

This is a duplicate of #1274.