https://issues.redhat.com/browse/RHEL-1671 introduces "dns-changed" event that resolv-prepender should act on. So now instead of a bunch of "-change" and "up" and "whatnot" events we have the one that clearly indicates that the DNS has been changed.

By embedding this into our logic, we will heavily optimize number of times our scripts are called.

It is important to check when exactly this is going to be shipped so that we synchronize our change with upstream NM.