[Email-SIG] Patch: Improve recognition of attachment file name, with encodings

[Bill Janssen]

>  > +        # nando: Some messages specify the file name of attachment this way:
>  >          if filename is missing:
>  > +            filename = self.get_param('name', missing, 'content-type')
>  > +        if filename is missing:
>  >              return failobj
>  > +        """The following line takes care of cases such as this:
>  > +Content-Disposition: attachment;
>  > +  filename="=?ISO-8859-1?Q?z=C7D-_Zoltan=5Fchunk=5F5.wmv?="
>  > +        """
>  > +        filename = decode_header(filename)[0][0]
>  >          return utils.collapse_rfc2231_value(filename).strip()
> 
> I feel your pain; Japanese MUAs do this kind of thing all the time,
> too.  However, decoding such garbage should not be done without
> specific permission from a human user, because it's forbidden by the
> standard.

Would it be possible to make this a configurable option, so that if
the user enables it, it's done?

Bill