LONDON (Reuters) - An Australian man committed suicide in a high-security Israeli jail in 2010 after being held for months in great secrecy, Australia's ABC channel said on Tuesday, throwing new light on a case that has rattled Israel. The unsourced Australian Broadcasting Corporation (ABC) story named the man, known previously only as "prisoner x", as Ben Zygier. It added that it "understood" the 34-year-old from Melbourne had been previously recruited by the Israeli spy agency Mossad. ...