/usr/share/doc/libfko-doc/ is in libfko-doc 2.6.0-2.2.
This file is owned by root:root, with mode 0o755.
..
/usr/share/doc/libfko-doc/NEWS.Debian.gz
/usr/share/doc/libfko-doc/changelog.Debian.gz
/usr/share/doc/libfko-doc/copyright
/usr/share/doc/libfko-doc/libfko.html/
/usr/share/doc/libfko-doc/libfko.html/Compiling-with-libfko.html
/usr/share/doc/libfko-doc/libfko.html/Concept-Index.html
/usr/share/doc/libfko-doc/libfko.html/Creating-Contexts.html
/usr/share/doc/libfko-doc/libfko.html/Creating-a-SPA-Message.html
/usr/share/doc/libfko-doc/libfko.html/Destroying-Contexts.html
/usr/share/doc/libfko-doc/libfko.html/Digests.html
/usr/share/doc/libfko-doc/libfko.html/Encryption-Algorithms.html
/usr/share/doc/libfko-doc/libfko.html/Error-Handling.html
/usr/share/doc/libfko-doc/libfko.html/Features.html
/usr/share/doc/libfko-doc/libfko.html/Function-and-Data-Index.html
/usr/share/doc/libfko-doc/libfko.html/Getting-Started.html
/usr/share/doc/libfko-doc/libfko.html/HMAC-Digests.html
/usr/share/doc/libfko-doc/libfko.html/Introduction.html
/usr/share/doc/libfko-doc/libfko.html/Library-Copying.html
/usr/share/doc/libfko-doc/libfko.html/Overview.html
/usr/share/doc/libfko-doc/libfko.html/Preparation.html
/usr/share/doc/libfko-doc/libfko.html/Retrieving-SPA-Data.html
/usr/share/doc/libfko-doc/libfko.html/SPA-Data-Format.html
/usr/share/doc/libfko-doc/libfko.html/SPA-Messages.html
/usr/share/doc/libfko-doc/libfko.html/SPA-Parameter-Types.html
/usr/share/doc/libfko-doc/libfko.html/Setting-SPA-Data.html
/usr/share/doc/libfko-doc/libfko.html/Using-libfko.html
/usr/share/doc/libfko-doc/libfko.html/Utility-Functions.html
/usr/share/doc/libfko-doc/libfko.html/index.html
/usr/share/doc/libfko-doc/libfko.html/libfko-Header.html