Another pass at the MIME stuff. This one seems to work OK, by

Another pass at the MIME stuff.  This one seems to work OK, by
providing a way for imail-resend to disable MIME processing.  (Also,
all MIME headers are stripped out before building up the MIME
framework.)  This code now supports MIME attachments, although there
needs to be a command to allow the user to attach a file or the
original mail message (if any), and also there needs to be an
attachment browser.