With Rebel Gains and Mobutu in France, Nation Is in Effect Without a Government
News analysis finds that six-month-old war for control of Zaire may have entered final chapter with seizure of important eastern city of Kisangani by mercenary-backed rebels that may presage end to ruthless, 31-year rule of Pres Mobutu Sese Seko; country remains, in effect, without Government, with Mobutu in France for treatments of advanced prostate cancer as his army and power have steadily crumbled; maps; photo (M)
