/usr/share/php/Horde/Http/ is in php-horde-http 2.1.1-4.
This file is owned by root:root, with mode 0o755.
..
/usr/share/php/Horde/Http/Client.php
/usr/share/php/Horde/Http/Exception.php
/usr/share/php/Horde/Http/Request/
/usr/share/php/Horde/Http/Request/Base.php
/usr/share/php/Horde/Http/Request/Curl.php
/usr/share/php/Horde/Http/Request/Factory.php
/usr/share/php/Horde/Http/Request/Fopen.php
/usr/share/php/Horde/Http/Request/Mock.php
/usr/share/php/Horde/Http/Request/Peclhttp.php
/usr/share/php/Horde/Http/Request/Peclhttp2.php
/usr/share/php/Horde/Http/Request/PeclhttpBase.php
/usr/share/php/Horde/Http/Response/
/usr/share/php/Horde/Http/Response/Base.php
/usr/share/php/Horde/Http/Response/Curl.php
/usr/share/php/Horde/Http/Response/Fopen.php
/usr/share/php/Horde/Http/Response/Mock.php
/usr/share/php/Horde/Http/Response/Peclhttp.php
/usr/share/php/Horde/Http/Response/Peclhttp2.php