/usr/include/ is in collectd-dev 4.10.1-2.1ubuntu7.
This file is owned by root:root, with mode 0o755.
..
/usr/include/collectd/
/usr/include/collectd/liboconfig/
/usr/include/collectd/liboconfig/oconfig.h
/usr/include/collectd/collectd.h
/usr/include/collectd/common.h
/usr/include/collectd/config.h
/usr/include/collectd/configfile.h
/usr/include/collectd/cpython.h
/usr/include/collectd/filter_chain.h
/usr/include/collectd/madwifi.h
/usr/include/collectd/meta_data.h
/usr/include/collectd/network.h
/usr/include/collectd/pinba.pb-c.h
/usr/include/collectd/plugin.h
/usr/include/collectd/types_list.h
/usr/include/collectd/utils_avltree.h
/usr/include/collectd/utils_cache.h
/usr/include/collectd/utils_cmd_flush.h
/usr/include/collectd/utils_cmd_getthreshold.h
/usr/include/collectd/utils_tail.h
/usr/include/collectd/utils_cmd_getval.h
/usr/include/collectd/utils_cmd_listval.h
/usr/include/collectd/utils_cmd_putnotif.h
/usr/include/collectd/utils_cmd_putval.h
/usr/include/collectd/utils_complain.h
/usr/include/collectd/utils_db_query.h
/usr/include/collectd/utils_dns.h
/usr/include/collectd/utils_fbhash.h
/usr/include/collectd/utils_format_json.h
/usr/include/collectd/utils_heap.h
/usr/include/collectd/utils_ignorelist.h
/usr/include/collectd/utils_llist.h
/usr/include/collectd/utils_match.h
/usr/include/collectd/utils_mount.h
/usr/include/collectd/utils_parse_option.h
/usr/include/collectd/utils_rrdcreate.h
/usr/include/collectd/utils_subst.h
/usr/include/collectd/utils_tail_match.h
/usr/include/collectd/utils_threshold.h