cookie — get, set and delete cookies.
cookie gets, sets, unsets or deletes a cookie. When you get a cookie, the command returns the value of the cookie, or an empty string if no cookie exists.
cookie delete will set the timeout value to -1 minutes - deleting the cookie in the browser.
cookie unset will remove the defined cookie in the server (perhaps preparatory to checking/resetting the cookie).
The command has a number of switches setting a cookie attributes