/usr/share/gnunet/config.d/ is in gnunet 0.10.1-2.1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/gnunet/config.d/arm.conf
/usr/share/gnunet/config.d/ats.conf
/usr/share/gnunet/config.d/conversation.conf
/usr/share/gnunet/config.d/core.conf
/usr/share/gnunet/config.d/datacache.conf
/usr/share/gnunet/config.d/datastore.conf
/usr/share/gnunet/config.d/dht.conf
/usr/share/gnunet/config.d/dns.conf
/usr/share/gnunet/config.d/exit.conf
/usr/share/gnunet/config.d/fs.conf
/usr/share/gnunet/config.d/gns.conf
/usr/share/gnunet/config.d/hostlist.conf
/usr/share/gnunet/config.d/identity.conf
/usr/share/gnunet/config.d/mesh.conf
/usr/share/gnunet/config.d/namecache.conf
/usr/share/gnunet/config.d/namestore.conf
/usr/share/gnunet/config.d/nat.conf
/usr/share/gnunet/config.d/nse.conf
/usr/share/gnunet/config.d/peerinfo.conf
/usr/share/gnunet/config.d/pt.conf
/usr/share/gnunet/config.d/regex.conf
/usr/share/gnunet/config.d/resolver.conf
/usr/share/gnunet/config.d/revocation.conf
/usr/share/gnunet/config.d/set.conf
/usr/share/gnunet/config.d/statistics.conf
/usr/share/gnunet/config.d/template.conf
/usr/share/gnunet/config.d/testbed.conf
/usr/share/gnunet/config.d/testing.conf
/usr/share/gnunet/config.d/topology.conf
/usr/share/gnunet/config.d/transport.conf
/usr/share/gnunet/config.d/util.conf
/usr/share/gnunet/config.d/vpn.conf