/usr/share/man/man1/mod-mono-server.1.gz is in mono-apache-server 4.2-2build1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/man/man1/mod-mono-server4.1.gz
/usr/share/man/man1/mod-mono-server4.1.gz