/usr/ is in php-horde-cache 2.5.0-2.
This file is owned by root:root, with mode 0o755.
..
/usr/share/
/usr/share/php/
/usr/share/php/.registry/
/usr/share/php/.registry/.channel.pear.horde.org/
/usr/share/php/.registry/.channel.pear.horde.org/horde_cache.reg
/usr/share/php/data/
/usr/share/php/data/Horde_Cache/
/usr/share/php/data/Horde_Cache/migration/
/usr/share/php/data/Horde_Cache/migration/1_horde_cache_base_tables.php
/usr/share/php/Horde/Cache/Storage/Mongo.php
/usr/share/php/data/Horde_Cache/migration/2_horde_cache_fix_blob_length.php
/usr/share/php/Horde/
/usr/share/php/Horde/Cache/
/usr/share/php/Horde/Cache/Exception.php
/usr/share/php/Horde/Cache/Storage/
/usr/share/php/Horde/Cache/Storage/File.php
/usr/share/php/Horde/Cache/Storage/Base.php
/usr/share/php/Horde/Cache/Storage/Apc.php
/usr/share/php/Horde/Cache/Storage/Memoryoverlay.php
/usr/share/php/Horde/Cache/Storage/Sql.php
/usr/share/php/Horde/Cache/Storage/Null.php
/usr/share/php/Horde/Cache/Storage/Xcache.php
/usr/share/php/Horde/Cache/Storage/Eaccelerator.php
/usr/share/php/Horde/Cache/Storage/Stack.php
/usr/share/php/Horde/Cache/Storage/Memory.php
/usr/share/php/Horde/Cache/Storage/Memcache.php
/usr/share/php/Horde/Cache/Storage/Hashtable.php
/usr/share/php/Horde/Cache/Storage/Session.php
/usr/share/php/Horde/Cache/Storage/Mock.php
/usr/share/php/Horde/Cache.php
/usr/share/doc/
/usr/share/doc/php-horde-cache/
/usr/share/doc/php-horde-cache/changelog.Debian.gz
/usr/share/doc/php-horde-cache/changelog.gz
/usr/share/doc/php-horde-cache/package.xml.gz
/usr/share/doc/php-horde-cache/copyright