Greenlight Email

Ideally I'd like to simply have Greenlight use localhost as an outgoing email server, however it currently only appears to work using authenticated SMTP with valid TLS certs, unauthenticated SMTP on port 25 isn't an option, see this comment and this merge request.

So I'm going to make it look for a SMTP password in /root/bbb.greenlight.smtp.password and use that with variables for the other SMTP settings for now.