RIYADH/ADEN, April 7 (Reuters) - A Saudi-Omani delegation is planning to travel to Yemen's capital Sanaa next week to hash out a permanent ceasefire deal with Houthi officials and end the country's eight-year-old conflict, two sources involved in the talks said. It is also a sign that regional rifts are easing after rivals Saudi Arabia and Iran agreed to restore relations last month after years of hostility and backing opposite sides in Middle Eastern conflicts, including Yemen. Abu Bakr Abeed, deputy head of Yemen's Chambers of Commerce, told Reuters ships would not have to stop at the Saudi Red Sea port of Jeddah for security checks for the first time since the Saudi-led coalition intervened in Yemen in 2015