bpo-39481: PEP 585 for a variety of modules (GH-19423)

- concurrent.futures
- ctypes
- http.cookies
- multiprocessing
- queue
- tempfile
- unittest.case
- urllib.parse

Lib/urllib/parse.py

@@ -29,6 +29,7 @@ test_urlparse.py provides a good indicator of parsing behavior.
 
 import re
 import sys
+import types
 import collections
 import warnings
 
@@ -176,6 +177,8 @@ class _NetlocResultMixinBase(object):
                 raise ValueError("Port out of range 0-65535")
         return port
 
+    __class_getitem__ = classmethod(types.GenericAlias)
+
 
 class _NetlocResultMixinStr(_NetlocResultMixinBase, _ResultMixinStr):
     __slots__ = ()