Interrupt .communicate() on SIGTERM/INT

GitHub fields:

assignee = None
closed_at = None
created_at = <Date 2018-02-18.21:41:07.594>
labels = ['type-bug', 'library']
title = 'Interrupt .communicate() on SIGTERM/INT'
updated_at = <Date 2018-03-05.05:32:48.982>
user = 'https://github.com/vporton'

bugs.python.org fields:

activity = <Date 2018-03-05.05:32:48.982>
actor = 'izbyshev'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = ['Library (Lib)']
creation = <Date 2018-02-18.21:41:07.594>
creator = 'porton'
dependencies = []
files = []
hgrepos = []
issue_num = 32871
keywords = []
message_count = 3.0
messages = ['312328', '313234', '313236']
nosy_count = 3.0
nosy_names = ['porton', 'izbyshev', 'ajk225']
pr_nums = []
priority = 'normal'
resolution = None
stage = None
status = 'open'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue32871'
versions = ['Python 3.6']