Open/close account creation mechanism

[ratsclub]

I would like to be able to open and close account registration through some mechanism. My ideas:

• Environment variable
• Model setting

The first is easier to implement, but requires the admin to restart the application. The latter allows the admin to change a value on the Django admin console, but introduces more code.

[sirodoht]

I would say environment variable. I'd rather we don't have settings for how the app works in the database.