socket.create_connection needs to support full IPv6 argument

GitHub fields:

assignee = None
closed_at = None
created_at = <Date 2017-12-05.18:44:36.950>
labels = ['3.7', 'type-bug', 'library']
title = 'socket.create_connection needs to support full IPv6 argument'
updated_at = <Date 2017-12-06.23:54:27.032>
user = 'https://bugs.python.org/MatthewStoltenberg'

bugs.python.org fields:

activity = <Date 2017-12-06.23:54:27.032>
actor = 'pitrou'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = ['Library (Lib)']
creation = <Date 2017-12-05.18:44:36.950>
creator = 'Matthew Stoltenberg'
dependencies = []
files = []
hgrepos = []
issue_num = 32224
keywords = []
message_count = 4.0
messages = ['307674', '307771', '307774', '307776']
nosy_count = 3.0
nosy_names = ['gregory.p.smith', 'pitrou', 'Matthew Stoltenberg']
pr_nums = []
priority = 'normal'
resolution = None
stage = 'needs patch'
status = 'open'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue32224'
versions = ['Python 2.7', 'Python 3.6', 'Python 3.7']