[dns-operations] populating ip6.arpa (was fewer PTRs plz)

[Jim Reid]

FWIW, there was a good discussion about this issue and the various  
trade-offs to be made at the last but one RIPE meeting. See
	http://ripe61.ripe.net/presentations/139-Ripe-61-rDNS-kzorba-freedman.pdf 
. The webcast, audio and a transcript of this discussion can be found at
	http://ripe61.ripe.net/archives/#Thursday.

Although the original thread here was about provisioning PTR records  
for IPv6 addresses, there's more. Some people want/need to have NAPTR  
and LOC records associated with reverse entries for IPv6 addresses or  
their /80s or whatever.