/usr/lib/x86_64-linux-gnu/mit-krb5/libkrb5support.so is in krb5-multidev 1.12.1+dfsg-19+deb8u4.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/mit-krb5/../libkrb5support.so.0.1