nmdc-log-service: add warning message if on TLS verification disabled

src/nmdc-log-service/main.go

@@ -119,6 +119,10 @@ func main() {
 		fmt.Fprintf(os.Stderr, "FATAL: Path '%s' is not a directory\n", BaseDir)
 	}
 
+	if !VerifyTLS {
+		fmt.Fprintf(os.Stderr, "WARNING: TLS certificates will not be verified!\n")
+	}
+
 	// Launch loggers
 	all_hubs := strings.Split(*hubs, ",")
 	launch_ct := 0