On Sunday night, Virgin are broadcasting the outstanding documentary Finding Jack Charlton. It could understandably lead to another outpouring of nostalgia, as well as that curious sensation we all experience now whenever we see alien footage of human beings gathered together in close proximity. Some will be unable to resist comparisons to Irish football today, especially if Ireland fail to beat Luxembourg on Saturday evening. Stephen Kenny watched his team score their first goal in seven games on Wednesday night so he will be hopeful that Ireland can get their first victory since he took over this weekend. If Ireland…