collectd (and thus all reverse dependencies) is threatened to be
autoremoved from testing due to not one, not two, but three RC bugs

Bug#926528 in collectd
Bug#925849 in varnish
Bug#932299 in owfs

Additionally anything linking against libcollectdclient1 pulls in (via
Recommends) 200 binary packages including Gtk, OpenJDK, bind9, ceph, ...
A wishlist bug (Bug#933296) has been filed to change this.

I currently don't see much gain in collectd integration in
freeradius-utils, so drop it for now