- restructure rspamd config. It's nicer now, and it was getting
overridden the old way.
- "scan_mime_parts = false" apparently must be used in rspamd for ClamAV
to work
- refactor the clamav test a bit for cleanliness
- wait for rspamd and clamd sockets to open, before testing
- use clamdscan for speed, and verify that the virus was found
- verify msmtp returns virus scan result