This warning at startup:

{
    "t": {"$date": "2022-12-19T08:37:18.220+01:00"},
    "s": "W",
    "c": "CONTROL",
    "id": 22133,
    "ctx": "initandlisten",
    "msg": "No client certificate validation can be performed since no CA file has been provided. Please specify an sslCAFile parameter"
}

is logged when the CAFile is unspecified. However, if clusterCAFile is specified (instead of CAFile), this warning is still logged even though client certificate validation can be performed using the clusterCAFile. We should fix it so that this warning only shows up if CAFile and clusterCAFile are not provided.