- Older versions of Webob escaped the doublequote to ``\"`` and the backslash
  to ``\\`` when quoting cookie values.  Now, instead, cookie serialization
  generates ``\042`` for the doublequote and ``\134`` for the backslash. This
  is what is expected as per RFC 6265.  Note that old cookie values that do
  have the older style quoting in them will still be unquoted correctly,
  however.