/usr/share/man/man3/pam_vsyslog.3.gz is in libpam0g-dev 1.1.3-7ubuntu2.3.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/man/man3/pam_syslog.3.gz
/usr/share/man/man3/pam_syslog.3.gz