gzip.py: Please save more of the gzip header for later examination

GitHub fields:

assignee = None
closed_at = None
created_at = <Date 2016-07-04.20:04:18.704>
labels = ['type-feature', 'library']
title = 'gzip.py: Please save more of the gzip header for later examination'
updated_at = <Date 2016-07-04.21:50:28.655>
user = 'https://bugs.python.org/joshtriplett'

bugs.python.org fields:

activity = <Date 2016-07-04.21:50:28.655>
actor = 'ppperry'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = ['Library (Lib)']
creation = <Date 2016-07-04.20:04:18.704>
creator = 'joshtriplett'
dependencies = []
files = []
hgrepos = []
issue_num = 27451
keywords = []
message_count = 1.0
messages = ['269808']
nosy_count = 1.0
nosy_names = ['joshtriplett']
pr_nums = []
priority = 'normal'
resolution = None
stage = None
status = 'open'
superseder = None
type = 'enhancement'
url = 'https://bugs.python.org/issue27451'
versions = ['Python 3.6']