(Updates to close) SYDNEY, Dec 31 (Reuters) - Australian shares ended the year more than 2 percent down, disappointing investors for the second year in a row as slumping iron ore and metal prices hit bluechip mining stocks while onerous capital rules hurt the heavyweight banking sector. The S&P/ASX 200 index slipped 0.5 percent on the last trading day of the year on Thursday to 5,295.9 points, staying near a 2-month high hit in the previous session. The benchmark rose 1 percent in th
