/usr/lib/freeradius/libfreeradius-radius.so is in libfreeradius-dev 2.2.5+dfsg-0.2+deb8u1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/freeradius/libfreeradius-radius-020205.so
/usr/lib/freeradius/libfreeradius-radius-020205.so