Control: block 793837 by 868756 I have filed a pre-approval question to the SRM to update the ntp package in Stretch to include sntp. They are not completely against it, see #868756.
The relevant code is now in https://anonscm.debian.org/git/pkg-ntp/pkg-ntp.git/log/?h=stretch. I will test it some more (all the upgrade paths) and then submit the diff to the SRMs for approval. Bernhard