A South African court has granted former President Jacob Zuma's request for a delay in his arms deal corruption trial, and adjourned proceedings for three weeks. Zuma this month started a 15-month sentence for contempt of court, a ruling that triggered some of the worst unrest of the post-apartheid era. He is also accused of receiving kickbacks over a $2 billion arms deal from the 1990s. He pleaded not guilty in May to charges including corruption, fraud and money laundering. He has evaded prosecution for more than a decade, and portrayed himself as the victim of a politically motivated witch-hunt.…