Upgrade tuples in socket to named tuple like

GitHub fields:

assignee = None
closed_at = None
created_at = <Date 2017-06-24.22:33:37.733>
labels = ['type-feature', '3.7', 'expert-IO']
title = 'Upgrade tuples in socket to named tuple like'
updated_at = <Date 2017-06-25.04:19:16.853>
user = 'https://github.com/skinny121'

bugs.python.org fields:

activity = <Date 2017-06-25.04:19:16.853>
actor = 'python-dev'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = ['IO']
creation = <Date 2017-06-24.22:33:37.733>
creator = 'Ben Lewis'
dependencies = []
files = []
hgrepos = []
issue_num = 30748
keywords = []
message_count = 1.0
messages = ['296792']
nosy_count = 1.0
nosy_names = ['Ben Lewis']
pr_nums = ['2390']
priority = 'normal'
resolution = None
stage = None
status = 'open'
superseder = None
type = 'enhancement'
url = 'https://bugs.python.org/issue30748'
versions = ['Python 3.7']