Description of problem: /etc/udev/rules.d is administrator territory. Most of the rules files there are old. Some should be moved to /usr/lib/udev/rules.d (aka %{_udevrulesdir}), a bunch should simply be dropped.
This bug appears to have been reported against 'rawhide' during the Fedora 23 development cycle. Changing version to '23'. (As we did not run this process for some time, it could affect also pre-Fedora 23 development cycle bugs. We are very sorry. It will help us with cleanup during Fedora 23 End Of Life. Thank you.) More information and reason for this action is here: https://fedoraproject.org/wiki/BugZappers/HouseKeeping/Fedora23
Note: rdma-core is OK, it has a sample in /etc/udev/rules.d.
Note: ntp-refclock is OK, it has a sample in /etc/udev/rules.d.
It's done!