/usr/share/doc/texlive-doc/README.Debian is in texlive-common 2009-15.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/texlive-doc/../texlive-common/README.Debian
/usr/share/doc/texlive-doc/../texlive-common/README.Debian