Hope it’s not spoiler. It took me a while to find the correct libc
The correct package version for it is: libc-bin_2.23-0ubuntu9_amd64
It can also be found inside ubuntu-16.04.3-server-amd64.iso (That’s how I found it)
I’m not sure if the author reads the posts (couldn’t find him in the list of users), but
I would provide exact libc package version unless you expect people to bruteforce
with all release libraries (currently Xerus Xenial doesn’t list this libc as option in apt list -a libc-bin)