Source: The National Herald By Associated Press NICOSIA — The best man slapped the groom on the back, which is an old Cypriot wedding custom. The priest punching the best man would be an innovation. But Cyprus police said Monday they are investigating an allegation that this happened at a wedding over the weekend. Police say the victim —the groom’s 22-year-old brother — was taken to a hospital but wasn’t seriously hurt and that his family filed a complaint. A family member — speaking on condition of anonymity because the investigation is continuing — said the priest had initially gestured…