Mail gateway fixes and improvements. - new mailgw config item unpack_rfc822 that unpacks message attachments of type message/rfc822 and attaches the individual parts instead of attaching the whole message/rfc822 attachment to the roundup issue. - Fix handling of incoming message/rfc822 attachments. These resulted in a weird mail usage error because the email module threw a TypeError which roundup interprets as a Reject exception. Fixes issue2550667. Added regression tests for message/rfc822 attachments with and without configured unpacking (mailgw unpack_rfc822, see Features above) Thanks to Benni Bärmann for reporting.

recursive-include share *
recursive-include roundup *.*
recursive-include frontends *.*
recursive-include scripts *.* *-*
recursive-include tools *.*
recursive-include test *.py *.txt
recursive-include doc *.html *.png *.txt *.css *.1 *.example
recursive-include detectors *.py
recursive-include templates *.* home* page*
global-exclude .svn .cvsignore *.pyc *.pyo .DS_Store
include run_tests.py *.txt demo.py MANIFEST.in MANIFEST
exclude BUILD.txt I18N_PROGRESS.txt TODO.txt
exclude doc/security.txt doc/templating.txt
include locale/*.po locale/*.mo locale/roundup.pot