Comment 7 for bug 1604010

Draft debdiff to enable and provide sntp in Yakkety.

For now only meant as reference - please do not upload yet.
If there is a autosubscribe of sponsors please due to this being a patch please ubsubscribe for now.

It has to changes to internal libopts and thereby drops the libopts25 runtime dependency.
I want to wait for ntp.org feedback what else will change before doing that change.