ycb_django_pr11848

what a new run launched now would send

django.utils.http.parse_http_date two digit year check is incorrect
Description
	 
		(last modified by Ad Timmering)
	 
RFC 850 does not mention this, but in RFC 7231 (and there's something similar in RFC 2822), there's the following quote:
Recipients of a timestamp value in rfc850-date format, which uses a
two-digit year, MUST interpret a timestamp that appears to be more
than 50 years in the future as representing the most recent year in
the past that had the same last two digits.
Current logic is hard coded to consider 0-69 to be in 2000-2069, and 70-99 to be 1970-1999, instead of comparing versus the current year.

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