/usr/share/man/man3/pam_vprompt.3.gz is in libpam0g-dev 1.1.8-3.1+deb8u2+b1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/man/man3/pam_prompt.3.gz
/usr/share/man/man3/pam_prompt.3.gz