A prominent jailed Egyptian pro-democracy campaigner, whose family says he is on a total hunger strike, could be force-fed to keep him alive amid international pressure on Cairo to free him, his sister said on Tuesday. Alaa Abdel-Fattah, a key figure in Egypt’s 2011 uprising that toppled long-time ruler Hosny Mubarak, began a partial hunger strike in April this year and stopped drinking water as of Sunday to coincide with the start of a major UN climate conference in Egypt, according to his family. Abdel-Fattah was last December sentenced to five years in prison on charges of spreading fake ne…