* @param string $name Unprefixed name of the cookie to set
* @param string|null $value Value of the cookie to set
* @param string|null $prefix Cookie prefix. Defaults to $wgCookiePrefix
* @param string $name Unprefixed name of the cookie to set
* @param string|null $value Value of the cookie to set
* @param string|null $prefix Cookie prefix. Defaults to $wgCookiePrefix