/etc/ is in icinga-web 1.11.2+dfsg1-1.
This file is owned by root:root, with mode 0o755.
..
/etc/icinga-web/conf.d/
/etc/apache2/
/etc/apache2/conf-available/
/etc/icinga-web/
/etc/icinga-web/conf.d/translation.xml
/etc/icinga-web/apache2.conf
/etc/icinga-web/conf.d/access.xml
/etc/icinga-web/conf.d/databases.xml
/etc/icinga-web/conf.d/exclude_customvars.xml
/etc/icinga-web/conf.d/auth.xml
/etc/icinga-web/conf.d/settings.xml
/etc/icinga-web/conf.d/views.xml
/etc/icinga-web/conf.d/logging.xml
/etc/icinga-web/conf.d/cronks.xml
/etc/icinga-web/conf.d/module_web.xml
/etc/icinga-web/conf.d/userpreferences.xml
/etc/icinga-web/conf.d/module_reporting.xml
/etc/icinga-web/conf.d/icinga.xml
/etc/icinga-web/conf.d/sla.xml
/etc/icinga-web/conf.d/module_appkit.xml
/etc/icinga-web/conf.d/factories.xml
/etc/icinga-web/conf.d/module_cronks.xml
/etc/apache2/conf-available/icinga-web.conf