Use email library to get filename attchments (get_filename). In case of failures, fallback
Nicolas Delaby authored
to old implementation by intropsecting message headers.


git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@34395 20353a03-c40f-0410-a6d1-a30d3c3de9de
04b4152e