I propose that calm will stop accepting uploads containing setup.hint some time shortly after 2017-11-18.
This is approximately one year after the cygport release [1] which, stopped generating these files, so if you're using cygport >= 0.23.0, no action is needed.
Warnings that you need to upgrade cygport have been generated for more than 6 months [2].
After setup.hint uploads are disabled, any remaining setup.hint in the cygwin release on sourceware.org will be migrated to pvr.hint(s), as per [3].
[1] https://cygwin.com/ml/cygwin-announce/2016-11/msg00078.html [2] https://cygwin.com/ml/cygwin-apps/2017-04/msg00024.html [3] https://cygwin.com/ml/cygwin-apps/2016-09/msg00025.html