Comment 21 for bug 1711760

This script runs and demonstrates functional dns.

It launches a guest with a custom kernel command line
pointing to a nocloud datasource running on the host.
It uses user mode networking to seed a dns server and a
dns search.

The 'seedfrom' is done over dns which would not work if this
change were put in place. To get that to work, you have to add
an entry in /etc/hosts for 10.0.2.2 (suggest 'qemu-host').

There is a PPA available at
  https://launchpad.net/~smoser/+archive/ubuntu/lp1711760
with the fix in place.