Enable import behavior consistency option

GitHub fields:

assignee = None
closed_at = None
created_at = <Date 2020-01-28.07:17:04.723>
labels = ['interpreter-core', 'type-feature', '3.9']
title = 'Enable import behavior consistency option'
updated_at = <Date 2020-01-28.07:17:04.723>
user = 'https://github.com/DarkTrick'

bugs.python.org fields:

activity = <Date 2020-01-28.07:17:04.723>
actor = 'bluelantern'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = ['Interpreter Core']
creation = <Date 2020-01-28.07:17:04.723>
creator = 'bluelantern'
dependencies = []
files = []
hgrepos = []
issue_num = 39473
keywords = []
message_count = 1.0
messages = ['360839']
nosy_count = 1.0
nosy_names = ['bluelantern']
pr_nums = []
priority = 'normal'
resolution = None
stage = None
status = 'open'
superseder = None
type = 'enhancement'
url = 'https://bugs.python.org/issue39473'
versions = ['Python 3.9']