[issue38976] Add support for HTTP Only flag in MozillaCookieJar

[Jacob Taylor]

Change by Jacob Taylor <me at jacobtaylor.id.au>:


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keywords: +patch
pull_requests: +16951
stage:  -> patch review
pull_request: https://github.com/python/cpython/pull/17471

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue38976>
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