register_new_matrix_user - impossible to create non-root user non-interactively

[vansickle]

This works correctly:

register_new_matrix_user -c homeserver.yaml -u root -p password -a https://localhost:8448

But this one:

register_new_matrix_user -c homeserver.yaml -u user -p password https://localhost:8448

asks whether user admin or not.

It should be possible at least to set smth like --admin=false

[richvdh]

fixed (finally) by #3836

[ki9us]

For anyone that googled their way here, it's --no-admin.