/usr/share/man/man5/pam_ldap.conf.5.gz is in libpam-ldap 186-4ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/man/man5/pam_ldap.5.gz
/usr/share/man/man5/pam_ldap.5.gz