The time has come to split off `UnsecureWebSocketsProtocol`. Proposal: - [x] Add a `logger.warn` on construction of `UnsecureWebSocketsProtocol` about it being insecure and deprecated (v4.0.0, https://github.com/CommunitySolidServer/CommunitySolidServer/pull/1248) - [ ] Create https://github.com/CommunitySolidServer/LegacyWebSockets and move `UnsecureWebSocketsProtocol` there (v5.0.0) - [ ] Remove from all v5 configurations (v5.0.0)