Bug Report from www.isc.org:

Name: Bernhard Schmidt
Email: Bernhard.Schmidt@lrz.de
Software Version: BIND 9.10.6
OS: Linux
Subject:named-checkzone: Warn on data hidden by delegation


Bug Detail
===========
It would be great if named-checkzone could warn about rrsets being hidden from queries because they are at the same level or even below delegating NS records

--- 
$TTL 86400

example.com.    SOA     ns1.provider.com. hostmaster.provider.com. 2017050214 21600 1800 3600000 86400

example.com.    NS      ns1.provider.com.
example.com.    NS      ns2.provider.com.

sub.example.com.        NS      ns1.provider.com.
sub.example.com.        NS      ns2.provider.com.
sub.example.com.        MX      10      mail.provider.com.

www.sub.example.com.    A       1.1.1.1
---

% /usr/sbin/named-checkzone example.com example.com
zone example.com/IN: loaded serial 2017050214
OK

Both sub.example.com/MX and www.sub.example.com/* will not be visible

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