In the case of FreeRADIUS, assuming you don't set PREFIX
explicitly to
something else, the default configuration files go in
/usr/local/etc/raddb, suffixed with .sample - so
/usr/local/etc/raddb/radiusd.conf.sample and so on.
That's awkward. Especially because the sample configs *work* out of
the box. That's the whole point of the sample configs. And worse,
there are a number of files that need to be set up properly before the
server runs, which makes copying the sample files even more work.
Could you update the port to install the files if they don't already
exist?