public void getConfig(LogdConfig.Builder builder) {
        var forwardAllLogLevels = isHostedVespa && featureFlags.forwardAllLogLevels();
        if (logserver == null) {
            builder.logserver(new LogdConfig.Logserver.Builder().use(false));
        }
        else {
            builder.logserver(new LogdConfig.Logserver.Builder().
                        use(logServerContainerCluster.isPresent() || !isHostedVespa).
                        host(logserver.getHostName()).
                        rpcport(logserver.getRelativePort(0)))
                    .loglevel(new LogdConfig.Loglevel.Builder().
                            debug(new LogdConfig.Loglevel.Debug.Builder().forward(forwardAllLogLevels)).
                            spam(new LogdConfig.Loglevel.Spam.Builder().forward(forwardAllLogLevels)));
        }
     }
Returns the log server for this, or null if none
config-model/src/main/java/com/yahoo/vespa/model/admin/Admin.java