message/rfc822 parser doesn't identify attachment filenames from Content-Disposition header

[Sergey Tsalkov]

rfc822 email files can contain attachments as subparts, and they'll
generally specify the filename of the attachment in a manner like
this:

Content-Disposition: attachment;
        filename*=utf-8''image001.jpg

Tika doesn't seem to be grabbing that information at all! Do you guys
think this is a bug, or am I doing something wrong?

Thanks!
Sergey