[urllib] proxy_bypass_registry - extra error handling required for ProxyOverride, Windows under proxy environment

GitHub fields:

assignee = None
closed_at = None
created_at = <Date 2017-12-31.14:01:24.115>
labels = ['easy', 'type-bug', 'library', '3.11']
title = '[urllib] proxy_bypass_registry - extra error handling required for ProxyOverride, Windows under proxy environment'
updated_at = <Date 2021-06-18.09:32:03.073>
user = 'https://bugs.python.org/chansolkim'

bugs.python.org fields:

activity = <Date 2021-06-18.09:32:03.073>
actor = 'iritkatriel'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = ['Library (Lib)']
creation = <Date 2017-12-31.14:01:24.115>
creator = 'chansol kim'
dependencies = []
files = []
hgrepos = []
issue_num = 32465
keywords = ['easy']
message_count = 2.0
messages = ['309284', '396036']
nosy_count = 2.0
nosy_names = ['chansol kim', 'iritkatriel']
pr_nums = []
priority = 'normal'
resolution = None
stage = None
status = 'open'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue32465'
versions = ['Python 3.11']