Friends of Ghislaine Maxwell are worried the disgraced socialite could get whacked in prison or die by suicide like her predator ex-lover and boss, Jeffrey Epstein. “I’m absolutely worried for her safety,” said Christopher Mason, a TV host and journalist who has known Maxwell since the 1980s. “Do I think [she’s] in danger? Yes.” Mason, who is appearing in the new docu-series “Surviving Jeffrey Epstein” in August on Lifetime, added that the threat to Maxwell — now headed to the same Manhattan lock-up where Epstein died last August — could be greater because of reports she might cooperate with authorities....