Todd Spangler NY Digital EditorFacebook and Twitter put measures in place Wednesday to limit distribution of a New York Post story based on emails — which the paper claimed were supplied by Trump lawyer Rudy Giuliani — purportedly revealing evidence of influence-peddling by Joe Biden’s son Hunter.According to the Post’s story, Hunter Biden in 2015 introduced his father, then VP in the Obama administration, to a top exec at Ukrainian energy company Burisma after Hunter joined the company’s