Preferred MIME name for ASCII is "US-ASCII", not "ANSI_X3.4-1968". Oops.

[sgt/charset] / MODULE

Module: libcharset
Author: Simon Tatham <anakin@pobox.com>
Description: Simple library for converting between character sets.
Evolved from one written specifically for PuTTY; now also used in
other programs by the same author.