Log message:
Initial import of chmlib, a library dealing with .chm files,
from pkgsrc-wip (by xtraeme@).

CHMLIB is a library for dealing with Microsoft ITSS/CHM format
files. Right now, it is a very simple library, but sufficient for
dealing with all of the .chm files I've come across. Due to the
fairly well-designed indexing built into this particular file
format, even a small library is able to gain reasonably good
performance indexing into ITSS archives. Since the last version
there have been major bugfixes, portability improvements, and minor
feature additions.