gentler cli error messages (#203)

CHANGELOG.md

@@ -1,5 +1,7 @@
 # v0.3.0-rc6
 
+CHANGE: Gentler CLI error messages by default (https://github.com/openziti/zrok/issues/203)
+
 CHANGE: Add favicon to web console (https://github.com/openziti/zrok/issues/198)
 
 CHANGE: Add configurable "terms of use" link in the controller configuration, and optionally display the link on the login form and registration forms (https://github.com/openziti/zrok/issues/184)

cmd/zrok/main.go

@@ -2,6 +2,7 @@ package main
 
 import (
 	"github.com/michaelquigley/pfxlog"
+	"github.com/openziti/zrok/tui"
 	"github.com/sirupsen/logrus"
 	"github.com/spf13/cobra"
 	"os"
@@ -83,6 +84,9 @@ var testCmd = &cobra.Command{
 
 func main() {
 	if err := rootCmd.Execute(); err != nil {
-		panic(err)
+		if panicInstead {
+			panic(err)
+		}
+		tui.Error("an error occurred", err)
 	}
 }