Status of this Memo

   This document is not an Internet Standards Track specification; it is
   published for the historical record.

   This document defines a Historic Document for the Internet community.  
   This document is a product of the Internet Engineering Task Force 
   (IETF).  It has been approved for publication by the Internet 
   Engineering Steering Group (IESG).  Not all documents approved by the
   IESG are a candidate for any level of Internet Standard; see Section 
   2 of RFC 5741. 

   Information about the current status of this document, any errata, 
   and how to provide feedback on it may be obtained at http://www.rfc-
   editor.org/info/rfc9999.
