Comment 2 for bug 1917099

I don't think that in this case NS records are needed. A NS record for parent.example.com will be valid for anything below, be it child.parent.example.com, host.child.parent.example.com or host.parent.example.com.

Also, we cannot accept patched submitted via launchpad, please have a look at https://docs.openstack.org/contributors/code-and-documentation/quick-start.html .