All reports of link-to-undocumented-manpage for the archive. The extended description of this tag is:
Symbolic links to the undocumented(7) manual page may be provided if no manual page is available, but that is deprecated.
The lack of a manual page is still a bug, and if at all possible you should write one yourself.
For help with writing manual pages, refer to the Man-Page-HOWTO at http://www.schweikhardt.net/man_page_howto.html, the examples created by dh_make, or the /usr/share/doc/man-db/examples directory. If the package provides --help output, you might want to use the help2man utility to generate a simple manual page.
Refer to Debian Policy Manual section 12.1 (Manual pages) for details.
This tag has not been emitted in any package tested by Lintian.