All reports of bad-so-link-within-manual-page for the archive. The extended description of this tag is:

Manual files that use the .so links to include other pages should only point to a path relative to the top-level manual hierarchy, e.g.

.so man3/boo.1.gz

Severity: important, Certainty: certain

Check: manpages, Type: binary

This tag has not been emitted in any package tested by Lintian.