CAIRO (Reuters) -Former army chief Abdel Fattah al-Sisi is set to secure six more years as Egypt's president in an election held in the shadow of the nearby war in the Gaza Strip, despite growing unease about the country's economic performance. Over nearly a decade in power, Sisi has presented himself as a guarantor of stability in a volatile region, a message that has added traction in a year when two conflicts, in Sudan and Gaza, have erupted on Egypt's borders. Politically, the Gaza war was a