Comment 7 for bug 1805183

If we want to backport this to stable releases, we need a test case. What I came up with, as I was not able to simulate dhcp lease refreshes, is:

(1) Append make_resolv_conf to the end of the file, so it gets executed
(2) Execute the file with bash -x and different settings and ensure there are no restarts if the settings are the same, and that there are if settings change.