An industry group representing the largest American internet companies warned Hong Kong’s government that changes to the city’s data-protection laws could impact companies’ ability to provide services in the city.The June 25 letter, which took issue with broad new rules created to curb doxxing — the targeted disclosure of individuals’ private information — was the latest sign of the dilemma faced by tech companies in Hong Kong, where the government has created harsh new rules to control what is said online.Once a haven of internet freedom on the doorstep of China’s tightly controlled internet, Hong Kong is home …