flag provided but not defined: -turn

[tvendelin]

I've installed Galene a few days ago from GitHub. The README mentions -turn command-line flag, but when trying to use it (both with arguments and without), I get

flag provided but not defined: -turn
Usage of ./galene:
  -cpuprofile file
        store CPU profile in file
  -data directory
        data directory (default "./data/")
  -groups directory
        group description directory (default "./groups/")
  -http address
        web server address (default ":8443")
  -insecure
        act as an HTTP server rather than HTTPS
  -mdns
        gather mDNS addresses
  -memprofile file
        store memory profile in file
  -mutexprofile file
        store mutex profile in file
  -recordings directory
        recordings directory (default "./recordings/")
  -redirect host
        redirect to canonical host
  -relay-only
        require use of TURN relays for all media traffic
  -static directory
        web server root directory (default "./static/")

[jech]

It was added on 18 January 2021. Perhaps your version is older than that?