/usr/sbin/makewhatis of sys-apps/man-1.5p does not create 'whatis' files for 0p, 1p and 3p section. I think 'sections' variable of /usr/sbin/makewhatis should be similar to 'MANSECT' of /etc/man.conf, which includes '0p', '1p' and '3p' (and 'tcl', 'p' and 'o').
Created attachment 72141 [details, diff] man-1.6a-makewhatis.patch try this patch ... makewhatis hard codes the sections rather than using man.conf, but this patch fixes that
The patch works well, thank you.
fixed in man-1.6b, thanks for testing