The United States agencies are facing hurdles over how to quickly release $10 million to expand virtual private network (VPN) access for millions of people in Iran, where demand for anti-censorship tools has surged amid weeks of unrest.Supporters of the Iranian opposition group, the National Council of Resistance of Iran, protest to demand an immediate stop to the violence against protesters in Iran and an end to detentions. (REUTERS)Officials at the State Department, US senators from both parties and other US agencies agree on the need to support software that helps Iranians bypass strict state internet controls. The funding would…