deps: compatiblity with requests ≥ 2.29.0 and urllib3 2.x (#3116)

Requirements are the same, so it's still possible to use `urllib3 < 2`
or `requests == 2.28.2` for example.

Signed-off-by: Felix Fontein <felix@fontein.de>

diff --git a/docker/transport/npipeconn.py b/docker/transport/npipeconn.py
index 87033cf..45988b2 100644
--- a/docker/transport/npipeconn.py
+++ b/docker/transport/npipeconn.py

@@ -5,17 +5,13 @@
 from .. import constants
 from .npipesocket import NpipeSocket
 
-import http.client as httplib
-
-try:
-    import requests.packages.urllib3 as urllib3
-except ImportError:
-    import urllib3
+import urllib3
+import urllib3.connection
 
 RecentlyUsedContainer = urllib3._collections.RecentlyUsedContainer
 
 
-class NpipeHTTPConnection(httplib.HTTPConnection):
+class NpipeHTTPConnection(urllib3.connection.HTTPConnection):
     def __init__(self, npipe_path, timeout=60):
         super().__init__(
             'localhost', timeout=timeout

diff --git a/docker/transport/sshconn.py b/docker/transport/sshconn.py
index 7421f33..a92beb6 100644
--- a/docker/transport/sshconn.py
+++ b/docker/transport/sshconn.py

@@ -11,12 +11,8 @@
 from docker.transport.basehttpadapter import BaseHTTPAdapter
 from .. import constants
 
-import http.client as httplib
-
-try:
-    import requests.packages.urllib3 as urllib3
-except ImportError:
-    import urllib3
+import urllib3
+import urllib3.connection
 
 RecentlyUsedContainer = urllib3._collections.RecentlyUsedContainer
 
@@ -99,7 +95,7 @@
         self.proc.terminate()
 
 
-class SSHConnection(httplib.HTTPConnection):
+class SSHConnection(urllib3.connection.HTTPConnection):
     def __init__(self, ssh_transport=None, timeout=60, host=None):
         super().__init__(
             'localhost', timeout=timeout

diff --git a/docker/transport/ssladapter.py b/docker/transport/ssladapter.py
index 6aa8003..69274bd 100644
--- a/docker/transport/ssladapter.py
+++ b/docker/transport/ssladapter.py

@@ -7,10 +7,7 @@
 
 from docker.transport.basehttpadapter import BaseHTTPAdapter
 
-try:
-    import requests.packages.urllib3 as urllib3
-except ImportError:
-    import urllib3
+import urllib3
 
 
 PoolManager = urllib3.poolmanager.PoolManager

diff --git a/docker/transport/unixconn.py b/docker/transport/unixconn.py
index 1b00762..fae10f2 100644
--- a/docker/transport/unixconn.py
+++ b/docker/transport/unixconn.py

@@ -1,20 +1,17 @@
 import requests.adapters
 import socket
-import http.client as httplib
 
 from docker.transport.basehttpadapter import BaseHTTPAdapter
 from .. import constants
 
-try:
-    import requests.packages.urllib3 as urllib3
-except ImportError:
-    import urllib3
+import urllib3
+import urllib3.connection
 
 
 RecentlyUsedContainer = urllib3._collections.RecentlyUsedContainer
 
 
-class UnixHTTPConnection(httplib.HTTPConnection):
+class UnixHTTPConnection(urllib3.connection.HTTPConnection):
 
     def __init__(self, base_url, unix_socket, timeout=60):
         super().__init__(
@@ -30,12 +27,6 @@
         sock.connect(self.unix_socket)
         self.sock = sock
 
-    def putheader(self, header, *values):
-        super().putheader(header, *values)
-
-    def response_class(self, sock, *args, **kwargs):
-        return httplib.HTTPResponse(sock, *args, **kwargs)
-
 
 class UnixHTTPConnectionPool(urllib3.connectionpool.HTTPConnectionPool):
     def __init__(self, base_url, socket_path, timeout=60, maxsize=10):

diff --git a/docker/types/daemon.py b/docker/types/daemon.py
index 10e8101..096b2cc 100644
--- a/docker/types/daemon.py
+++ b/docker/types/daemon.py

@@ -1,9 +1,6 @@
 import socket
 
-try:
-    import requests.packages.urllib3 as urllib3
-except ImportError:
-    import urllib3
+import urllib3
 
 from ..errors import DockerException
 

diff --git a/tests/unit/api_test.py b/tests/unit/api_test.py
index a2348f0..4b6099c 100644
--- a/tests/unit/api_test.py
+++ b/tests/unit/api_test.py

@@ -16,9 +16,9 @@
 import docker
 import pytest
 import requests
+import urllib3
 from docker.api import APIClient
 from docker.constants import DEFAULT_DOCKER_API_VERSION
-from requests.packages import urllib3
 from unittest import mock
 
 from . import fake_api