Retrieves (in Cookie-header form) the list of cookies that would be sent with a request to
true, the return value will include cookies marked "HttpOnly" (that is, cookies that the server wishes
CookieJar sets the Cookie header itself when making the actual HTTP request, you
should almost certainly be setting
false if you are calling this.
whether or not the return value is being passed directly to an HTTP operation
the cookies, in string form, or