siconv (StreamICONV) filters its stdin to stdout
while converting from one character set to
another. It does this via the iconv(3) function
provided by glibc (but not well documented under
Linux). All you need to do is cat your data
through it and redirect stdout to your desired
file or program. The iconv command line function
that comes with glibc appears to read everything
into a single buffer before converting. If you
need to translate 1GB of data, that obviously
wouldn't work; thus, this program.
