Config file switches to add

[justinclift]

It's probably a good idea for us to add some configuration file variables:

1. A true/false option for disabling further registrations
2. A true/false option for disabling database uploads
3. A true/false option for displaying a warning about "this is a development system, don't store important data on this yet"

The first two may turn out to be useful when we first roll this out, as we're getting an understanding of if/how/etc to scale out the systems. eg if we start hitting capacity issues we could use these to slow down user/database growth as we get things figured out

The third might be better implemented as some form of general "message to be displayed on registration" or something, and would need further thinking about. :smile: