the service, *then* set this variable to 'true'.
inviteonly: If set to 'true', will only allow registration if the user
was invited by an existing user.
+openidonly: If set to 'true', will only allow registrations and logins
+ through OpenID.
private: If set to 'true', anonymous users will be redirected to the
'login' page. Also, API methods that normally require no
authentication will require it. Note that this does not turn