Verification-done for xenial with klibc 2.0.4-8ubuntu1.16.04.4:
I verified that updating klibc-utils to the new version yields a /run/net-ens3.conf file that contains the proper value at DOMAINSEARCH=.
As for the above test on zesty, this involved modifying scripts/functions to allow breaking the boot at initramfs after networking to validate the file contents early.
Verification-done for xenial with klibc 2.0.4-8ubuntu1. 16.04.4:
I verified that updating klibc-utils to the new version yields a /run/net-ens3.conf file that contains the proper value at DOMAINSEARCH=.
As for the above test on zesty, this involved modifying scripts/functions to allow breaking the boot at initramfs after networking to validate the file contents early.