Merge branch 'fix-double-domain' into 'main'

Do not append domain twice when updating mailbox

See merge request etke.cc/postmoogle!23

bot/command.go

@@ -295,9 +295,5 @@ func (b *Bot) setOption(ctx context.Context, name, value string) {
 		return
 	}
 
-	if name == optionMailbox {
-		value = value + "@" + b.domain
-	}
-
 	b.Notice(ctx, evt.RoomID, fmt.Sprintf("`%s` of this room set to `%s`", name, value))
 }