* mail-display.c (on_link_clicked): Handle clicks on "cid" URLs by
popping up a "Save Attachment" dialog.
* mail-format.c (get_cid): if the part has a Content-Disposition
with a filename specified, record (a sanitized version of) that on
the wrapper when creating the cid reference, so the "save
attachment" code can use it later.
(handle_mystery): fix a bug in the cid generation here.
svn path=/trunk/; revision=2685