By , MILAN (Reuters) - An Italian administrative court has annulled a watchdog ruling capping French media giant Vivendi’s stake in Mediaset, a court document showed, in a blow to the Italian broadcaster run by ex-prime minister Silvio Berlusconi’s family.Slideshow Vivendi and Mediaset have been at odds since 2016 when the French group ditched an accord to buy Mediaset’s pay-TV unit and built a 29% stake that the Italian group considers hostile.Vivendi was forced to transfer two thirds of its voting rights in Mediaset into a trust after Italy’s communications regulator AGCOM ruled in 2017...…By , MILAN (Reuters) - An Italian administrative court has annulled a watchdog ruling capping French media giant Vivendi’s stake in Mediaset, a court document showed, in a blow to the Italian broadcaster run by ex-prime minister Silvio Berlusconi’s family.Slideshow Vivendi and Mediaset have been at odds since 2016 when the French group ditched an accord to buy Mediaset’s pay-TV unit and built a 29% stake that the Italian group considers hostile.Vivendi was forced to transfer two thirds of its voting rights in Mediaset into a trust after Italy’s communications regulator AGCOM ruled in 2017...WW…