Using DNAME to rename IP6.INT

Various political and technical pressures have recently led to the
deprecation of the IP6.INT name space in favour of IP6.ARPA.  This makes
IPv6 PTR data management difficult, since interim clients will search
IP6.INT while standard clients will search IP6.ARPA.  We present a simple
method based on DNAME RR's (see [RFC2672]) and ISC BIND9 whereby zone
information can be managed in a single location and then made visible in
two namespaces.