PROBLEM:  (QAR 55268)	(Patch ID: OSF410CDE-400011)
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This patch lets dtmail correctly display Japanese and Korean mail messages
that do not have a Content-Type header.

The patch only takes effect when you run dtmail in a Japanese or Korean locale.
It is useful if you receive mail from older Japanese or Korean mail programs
that encode their messages in ISO-2022-JP or ISO-2022-KR, but do not include
a MIME Content-Type header.  That header normally identifies the encoding of
the mail message like this:

    Content-Type: text/plain; charset=ISO-2022-JP

For Japanese and Korean mail messages that do not include this header, dtmail
currently assumes that they are encoded in us-ascii.  As a result, it does
not display them correctly.  This patch fixes the problem by telling dtmail
to assume that the messages are encoded in ISO-2022-JP for Japanese locales
and ISO-2022-KR for Korean locales.