use Short if defined

Signed-off-by: Jeff Carr <jcarr@wit.com>

flags.go

@@ -120,6 +120,9 @@ func (f *LogFlag) Register() {
 	defer flagsMutex.Unlock()
 	Info("log.Register() ", f)
 	f.Default = f.B
+	if f.Short == "" {
+		f.Short = f.Subsystem
+	}
 	flags = append(flags,f)
 }
 

log.go

@@ -34,7 +34,7 @@ func Log(x any, a ...any) {
 		if ! f.B {
 			return
 		}
-		a = append([]any{f.Subsystem}, a...)
+		a = append([]any{f.Short}, a...)
 		origlog.Println(a...)
 	default:
 		a = append([]any{x}, a...)