/usr/share/man/man3/pmInDom_serial.3.gz is in libpcp3-dev 4.0.1-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/man/man3/pmInDom_build.3.gz
/usr/share/man/man3/pmInDom_build.3.gz