[dns-operations] 172.in-addr.arpa DNSSEC broken

[cgielen+dnsoarc at gielen.name]

DNSSEC-validation fails for 172.in-addr.arpa . This causes reverse DNS
lookups to fail for all IPv4-address starting with 172.

http://dnsviz.net/d/16.172.in-addr.arpa
-- 
Casper Gielen <cgielen at uvt.nl> | LIS UNIX
PGP fingerprint = 16BD 2C9F 8156 C242 F981  63B8 2214 083C F80E 4AF7

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