Fix buffer overflow and possible ISO image corruption in wrong handling of "." character case in makefs ISO level 1 and 2 filename conversion.
Fix buffer overflow and possible ISO image corruption in wrong
handling of "." character case in makefs ISO level 1 and 2 filename
conversion.

Filed as NetBSD PR #45285
http://gnats.netbsd.org/cgi-bin/query-pr-single.pl?number=45285

Reviewed by:	Christos Zoulas <christos@netbsd.org>
Approved by:	re (kib)
MFC after:	3 days

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase