Implement handlers to normalise how logging is handled

internal/cli/show/show.go

@@ -2,15 +2,15 @@ package nettest
 
 import (
 	"github.com/alecthomas/kingpin"
+	"github.com/apex/log"
 	"github.com/openobservatory/gooni/internal/cli/root"
-	"github.com/openobservatory/gooni/internal/util"
 )
 
 func init() {
 	cmd := root.Command("show", "Show a specific measurement")
 
 	cmd.Action(func(_ *kingpin.ParseContext) error {
-		util.Log("Show")
+		log.Info("Show")
 		return nil
 	})
 }