By Gibran Naiyyar Peshimam and Ariba Shahid ISLAMABAD (Reuters) -A court in Pakistan jailed Imran Khan for 10 years on Tuesday for leaking state secrets, the harshest sentence the popular former prime minister and cricket superstar has received and one announced just days before a general election. The special court found Khan, 71, guilty of making public the contents of a secret cable from Pakistan’s ambassador in Washington to the Islamabad government, his Pakistan Tehreek-e-Insaf (PTI) party said. Former foreign minister Shah Mehmood Qureshi was also sentenced to 10 years in the same case. …