LONDON (Reuters) - British singer George Michael has rescheduled dates of a tour he was forced to cancel when he fell ill with severe pneumonia last year and spent several weeks in a Vienna hospital. "George Michael is back in good health and fighting fit after a battle with pneumonia," said a statement released on his behalf on Tuesday. The 48-year-old former Wham! frontman will re-start his "Symphonica" tour on September 4 with a new concert in Vienna, where he will donate 1,000 tickets as a thank you to the medical staff who treated him. ...