NAYRAB, Syria, Dec 16 (Reuters) - As Australia's worst mass shooting in nearly 30 years unfolded, a Sydney shopowner was captured on camera charging at one of the gunmen and disarming him. Halfway around the world in Syria, a group of men watching the footage recognised a familiar face.     Ahmed al-Ahmed, 43, left his hometown in Syria's northwest province of Idlib nearly 20 years ago to seek work in Australia. On Sunday, he was wounded after wrestling a rifle away from a man attacking a Jewish holiday event at Sydney's Bondi Beach, in which 15 people were killed. Read full story