/usr/lib/x86_64-linux-gnu/libresip.so is in libresiprocate-1.10-dev 1:1.10.1-2ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libresip-1.10.so
/usr/lib/x86_64-linux-gnu/libresip-1.10.so