[imp] Appledouble MIME attachments not parsing properly

[Kevin Myer]

I'm seeing this issue in both FRAMEWORK_3 and HEAD.  It's manifested itself with
user reports that they are sending messages with attachments and the recipient
is claiming there is no attachment there.  The message is the proper size and
viewing the source shows the raw MIME data is there.

Same issue whether appledouble MIME inline viewer is enabled or not.

Message sample:

This message is in MIME format.

--=_5j8piom99qbk
Content-Type: text/plain;
	charset=ISO-8859-1
Content-Disposition: inline
Content-Transfer-Encoding: 7bit

Message written here....

--=_5j8piom99qbk
Content-Type: multipart/appledouble;
	boundary="=_18gz48c2m0kg";
	name="A MS Word.doc"
Content-Disposition: attachment;
	filename="A MS Word.doc"
Content-Transfer-Encoding: base64
Base64 encoded message here...

--=_18gz48c2m0kg--

--=_5j8piom99qbk--

The MIME encoding looks right to me but what I see when I read the message in
IMP is two text/plain parts - one is properly sized and contains the "Message
written here...." text.  The other is 0KB and contains the "There was no text
in this message part" notice.

Seems to be causing problems for non-IMP users too, who receive AppleDouble
messages sent from IMP.

Kevin
-- 
Kevin M. Myer
Senior Systems Administrator
Lancaster-Lebanon Intermediate Unit 13  http://www.iu13.org