[Email-SIG] 8bit encoding for text/xml multipart parts

[Bill Janssen]

I'm using the Python 2.3.5 email.MIMEText.MIMEText class to package up
some XML, charset=utf8, and it constantly generates base64-encoded
parts.  That's not what I want: I want 8bit.  My application can
handle it.  One can get 8bit for problematic stuff like image/png, but
not for text/xml.  Why not?  What's the design decision here?  Looking
at email.Message, I don't see any comments on point.

Bill