CVE-2022-23607: Unsafe handling of user-specified cookies in treq

Treq’s request methods (treq.get, treq.post, HTTPClient.request, HTTPClient.get, etc.) accept cookies as a dictionary, for example:

treq.get('https://example.com/', cookies={'session': '1234'})

Such cookies are not bound to a single domain, and are therefore sent to every domain (“supercookies”). This can potentially cause sensitive information to leak upon an HTTP redirect to a different domain., e.g. should https://example.com redirect to http://cloudstorageprovider.com the latter will receive the cookie session.