hostname verification fails if hostname starts with literal IPv4

GitHub fields:

assignee = 'https://github.com/tiran'
closed_at = None
created_at = <Date 2020-08-15.09:25:03.871>
labels = ['expert-SSL', 'type-bug', '3.8', '3.9', '3.10']
title = 'hostname verification fails if hostname starts with literal IPv4'
updated_at = <Date 2021-08-08.10:48:30.192>
user = 'https://github.com/dnmvisser'

bugs.python.org fields:

activity = <Date 2021-08-08.10:48:30.192>
actor = 'Amir'
assignee = 'christian.heimes'
closed = False
closed_date = None
closer = None
components = ['SSL']
creation = <Date 2020-08-15.09:25:03.871>
creator = 'dnmvisser'
dependencies = []
files = []
hgrepos = []
issue_num = 41556
keywords = []
message_count = 5.0
messages = ['375454', '375457', '375458', '391400', '399213']
nosy_count = 4.0
nosy_names = ['christian.heimes', 'akvadrako', 'Amir', 'dnmvisser']
pr_nums = []
priority = 'normal'
resolution = None
stage = None
status = 'open'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue41556'
versions = ['Python 3.8', 'Python 3.9', 'Python 3.10']