Looking at the hidden files - I have those too!
$ file .k5*
.k5identity.5.gz: gzip compressed data, max compression, from Unix, truncated
.k5login.5.gz: gzip compressed data, max compression, from Unix, truncated
$ pacman -Qo /usr/share/man/man5/.k5*
/usr/share/man/man5/.k5identity.5.gz is owned by krb5 1.18.2-1
/usr/share/man/man5/.k5login.5.gz is owned by krb5 1.18.2-1
I can view them by using man -l and the file path, but not normally with man. They appear to have been mis-installed by that package and probably shouldn't have a dot in front. So I think the last 2 warnings are false positives, that leaves a few more to consider.