/usr/share/man/man1/lzfgrep.1.gz is in xz-lzma 5.1.1alpha+20110809-3.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/man/man1/xzgrep.1.gz
/usr/share/man/man1/xzgrep.1.gz