MICHAEL HOLDEN A Scottish court rejected on Friday an appeal to overturn the conviction of a now-deceased Libyan man found guilty of the 1988 Lockerbie plane bombing which killed 270 people. Abdel Basset al-Megrahi, an intelligence officer who died in 2012, was jailed for life in 2001 for the murder of 243 passengers, 16 crew and 11 residents of the Scottish town in the deadliest militant attack in British history. In March, an independent Scottish review ruled that his family could launch a third appeal due to a possible miscarriage of justice. But on Friday, five judges at the Court…