Message passing

[drgreco]

Need to find a new way to pass messages to/from the daemon, so that it can run as root, or even some other unprivileged user (currently set to run as www-data). This would allow for tighter security.

We need a method of message passing that:

• does not thrash the disk
• is fast so that the user does not have to wait for their firewall rule to be implemented
• does not add significant complexity to the application or its install
• maintains a high level of security

[drgreco]

Daemon now uses a REST API for message passing, and should be the only part of the app that is touching the database and logging.

• can be run as any user
• can be potentially run on a machine that is not the same as the web app is stored on. We will want SSL for this first.