The cookie-rs library parses the cookie expiry date based on the format
from RFC 2616 (for HTTP/1.1), which is stricter than the format from RFC
6265 (for HTTP cookie).
This patch implements the cookie expiry date algorithm from RFC 6265.
When Cookie::parse fails in parsing the expiry date, we try to parse the
expiry again with this algorithm, to provide extra compatibility with
legacy systems.
Testing: Pass a WPT test that was expected to fail before, and add a
unit test.
Fixes: #36452
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Signed-off-by: Kingsley Yung <kingsley@kkoyung.dev>
464d71ecfc