Package cookie implements prediate to check parsed cookie headers by name and value.
const Name = "Cookie"
The predicate can be referenced in eskip by the name "Cookie".
New creates a predicate specification, whose instances can be used to match parsed request cookies.
The cookie predicate accepts two arguments, the cookie name, with what a cookie must exist in the request, and an expression that the cookie value needs to match.
Cookie("tcial", /^enabled$/) -> "https://www.example.org";