/usr/share/doc/strongswan-tnc-ifmap/NEWS.Debian.gz is in strongswan-tnc-ifmap 5.3.5-1ubuntu3.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/strongswan-tnc-ifmap/../libstrongswan/NEWS.Debian.gz