Are there five different account types?

Thanks for that summary, it has helped! For future readers:

  • –server_user is a deprecated synonym for --server_control_user.
  • I have been utterly unable to use an htpasswd “auth user” work in the webui. Only the control user wants to authenticate.
  • There does not seem to be a way to specify a “normal user” for use by the web ui; its persistent default is an empty view of local snapshots, I believe of “root”, who does not own any snapshots.