GUANGZHOU, China (Reuters) - Chinese police broke up scuffles outside the gates of a prominent newspaper in southern Guangzhou on Tuesday, as Communist Party authorities showed signs of a taking a harder line against journalists defying official censorship. Crowds of people congregated for a second day outside the liberal Southern Weekly that has become embroiled in a highly symbolic open revolt against press control in Guangdong, China's most prosperous and liberal province, but many journalists were reluctant to call it a full-blown strike. ...