/usr/share/man/man5/maildroprc.5.gz is in maildrop 2.5.5-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/man/man5/../man7/maildropfilter.7.gz
/usr/share/man/man5/../man7/maildropfilter.7.gz