By default:
- `ssid_sessions[socket.ssid]` is now `session_data`
- `require` is no longer allowed in user scripts
To access global `socket_sessions` and `ssid_sessions`, as well as `require` additional modules, you must set `privileged: true` for the specific service. See `config.json`.
- viewer seems to retain only wtv-* and wtv-head-waiter, so lets try to be closer to protocol and boot with a wtv-head-waiter address instead of wtv-1800
- we still handle via wtv-1800 but we accept wtv-head-waiter:/relogin and send the client on its way to the relogin path
