Implement MSC 4228 Search Redirection
See https://github.com/matrix-org/matrix-spec-proposals/pull/4228 for details. Since this is tricky to test without server-side support, I have added a basic implementation to the mock server in appiumtests/login-server.py
- Start appiumtests/login-server.py
- Start neochat with "--test --ignore-ssl-errors" options
- Open "Explore Rooms"
- Search for the exact string "forbidden"
- See new error message provided by server