BEIJING/HONG KONG (Reuters) -Country Garden has won approval from its creditors to extend the maturity of one more onshore bond, sources with knowledge of the matter said, as the Chinese developer battles to avoid a default amid Beijing's efforts to stabilise the crisis-hit sector. The maturity period of the cash-strapped Country Garden's onshore bond has been extended by three years, said the sources, who declined to be named as they were not authorised to speak to the media. Country Garden's financial woes are the latest to hit the beleaguered property sector, which was once...