dwaite/cookiejar — pull request #11 by staii (2014-01-07 16:41:28+00:00)
Title: 'version' is a valid cookie parameter seen in the wild.

The 'version' cookie parameter appears in the wild (for example, Amazon.com returns it with some cookies sometime, although I have not been able to narrow it down to a repeatable scenario), and seems to have existed at least at some time: http://www.ietf.org/rfc/rfc2109.txt