recvmsg support on Windows

GitHub fields:

assignee = None
closed_at = None
created_at = <Date 2019-03-06.18:01:03.896>
labels = ['type-feature', 'OS-windows']
title = 'recvmsg support on Windows'
updated_at = <Date 2019-03-06.18:01:03.896>
user = 'https://github.com/chrysn'

bugs.python.org fields:

activity = <Date 2019-03-06.18:01:03.896>
actor = 'chrysn'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = ['Windows']
creation = <Date 2019-03-06.18:01:03.896>
creator = 'chrysn'
dependencies = []
files = []
hgrepos = []
issue_num = 36217
keywords = []
message_count = 1.0
messages = ['337337']
nosy_count = 5.0
nosy_names = ['paul.moore', 'tim.golden', 'chrysn', 'zach.ware', 'steve.dower']
pr_nums = []
priority = 'normal'
resolution = None
stage = None
status = 'open'
superseder = None
type = 'enhancement'
url = 'https://bugs.python.org/issue36217'
versions = []