the exact file to be modified is in the header of the diff;
it is more correct in case than the filename, and specifies which jar.

once applied, point to an atom feed where each entry is a well-formed, message/rfc822 header.
this may require some faking, as real headers are insecure.

currently the content from the feed is written one attachment at a time to a folder.
badly formed content will result in badly formed folders.

we should generate our own clean headers for display using data from the content;
the css used to display "headers" can be used effectively.