AUTH-2648 updated usage text

cmd/cloudflared/main.go

@@ -61,7 +61,7 @@ func main() {
 	app := &cli.App{}
 	app.Name = "cloudflared"
 	app.Usage = "Cloudflare's command-line tool and agent"
-	app.ArgsUsage = "origin-url"
+	app.UsageText = "cloudflared [global options] [command] [command options]"
 	app.Copyright = fmt.Sprintf(
 		`(c) %d Cloudflare Inc.
    Your installation of cloudflared software constitutes a symbol of your signature indicating that you accept

cmd/cloudflared/tunnel/cmd.go

@@ -223,6 +223,9 @@ func createLogger(c *cli.Context, isTransport bool) (logger.Service, error) {
 	logLevel := c.String("loglevel")
 	if isTransport {
 		logLevel = c.String("transport-loglevel")
+		if logLevel == "" {
+			logLevel = "fatal"
+		}
 	}
 	loggerOpts = append(loggerOpts, logger.LogLevelString(logLevel))