/usr/share/man/man1/bogolexer-bdb.1.gz is in bogofilter-bdb 1.2.4+dfsg1-4build1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/man/man1/bogolexer.1.gz
/usr/share/man/man1/bogolexer.1.gz