This location seems a bit arbitrary. Why not just put it in at the same line to reduce the diff?

I don't think this does anything... it should only do something if the directory was built via make libraries and required by something else.

However, if you're moving it around as a cleanup commit, please do this separately.

"Use "... "the"?

... instead of what version?

I thought MANDOCDB just built manioc with sqlite3 support..?

Seems like the old behavior of hard linking manioc.1 -> mdocml.1 be preserved?

Ok I'll change that before committing

Now 2 options can require libsqlite3: WITH_MANDOC and WITH_KERBEROS so the dependency chain cannot be only defined for WITH_KERBEROS

mandoc is always built with sqlite3 support
mandocdb activates makewhatis, apropos, whatis from mandoc which gives you semantic search