PARIS (Reuters) – French singer and songwriter Georges Moustaki, beloved in France for his songs celebrating liberty and collaborations with Edith Piaf, died on Thursday after a long illness. He was 79. The Greek-born singer grew up in Alexandria, Egypt, and arrived in Paris in 1951, where he began to play guitar at nightclubs and met some of the period's best-known singers. He was introduced to Edith Piaf in the late 1950s and started to write songs for the Parisian star, the most famous of which was "Milord" about a lower-class girl who falls in love with an upper-class British traveler. …