/usr/lib/x86_64-linux-gnu/libdapserver.so is in libdap-dev 3.12.0-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libdapserver.so.7.5.0
/usr/lib/x86_64-linux-gnu/libdapserver.so.7.5.0