Public bug reported:

We currently have a maas 1.9.5 setup on trusty that has 4 subnets
defined in it under 10.x.0.0, one /24, 2 /23s and a /21.  With the
latest version of maas installed it appears that it is writing out two
zones configs for x.10.in-addr.arpa in the named.conf.maas file, which
is causing bind to error out.

After a bit of debugging, I've confirmed that it is being passed one
DNSForwardZoneConfig (for the maas zone) and 2 DNSReverseZoneConfigs
(for the x.10.in-addr.arpa zones).

Given the zones will overlap in the x.10.in-addr.arpa, it seems there
needs to be a way to handle that in the code.

Please let me know if you need any further information.

Versions:
$ dpkg-query -W maas
maas    1.9.5+bzr4599-0ubuntu1~14.04.1

$ lsb_release -dc
Description:    Ubuntu 14.04.5 LTS
Codename:       trusty

** Affects: maas (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: canonical-bootstack

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https://bugs.launchpad.net/bugs/1680286

Title:
  MAAS DNS doesn't handle non /24 subnets well

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