Tip of 'next' has been rewound post 2.17

[Junio C Hamano <gitster@xxxxxxxxx>]

I'll follow up with the full copy of "What's cooking" report later,
but here is a quick heads-up to warn those who have been building
their private editions on top of 'next' that the tip of 'next' has
been rebuilt, while kicking a few topics back to 'pu'.

Thanks.