/usr/share/man/man1/check_postgres_pgb_pool_maxwait.1p.gz is in check-postgres 2.22.0-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/man/man1/check_postgres.1p.gz
/usr/share/man/man1/check_postgres.1p.gz