The United Nations has reported “positive” signs for renewing a truce that has eased suffering in war-torn Yemen, though there was no concrete breakthrough early Thursday, when the initial deal was set to expire. Aid agencies and Western governments have urged the Yemeni government and Huthi rebels to extend the truce, which has significantly reduced the intensity of fighting in a conflict the United Nations says has triggered the world’s worst humanitarian crisis. “We have received preliminary, positive indications from the parties at this point,” Stephane Dujarric, spokesman for UN chief Ant…