Subject: Cookie eviction algorithm tweak

From: Martin Thomson <[email-masked]>
Date: Thu, 15 Feb 2018 12:37:19 +1100

I just opened https://github.com/httpwg/http-extensions/issues/494

It's a long issue, with lots of rationale.  The change it proposes is small:

1. require that when constructing a Cookie header field the
last-access date is set to the same value for all cookies

2. modify the eviction algorithm so that all unexpired cookies with
the same last-access date are dropped at the same time

Right now, implementations aren't especially consistent in their
eviction handling and this might help remove some of the unnecessary
(and potentially risky) variation.