By Samuel McKeith SYDNEY, Dec 21 (Reuters) - Australia honoured victims on Sunday of a gun attack a week earlier on a ?seaside ?Hanukkah celebration, as the prime minister announced a review of the ?country's law enforcement and intelligence agencies. The nation marked a day of reflection to honour the 15 people killed and the dozens wounded in the attack ?by two gunmen at Sydney's Bondi Beach. With security tight and flags at half-staff on government buildings, a minute of silence was held at 6:47 p.m. (0747 GMT), the time the attack began. Television and radio networks paused for a...