Reddit Changes Content Rules as Steve Huffman Takes Charge

The return of a founder to a company is a well-worn story line in Silicon Valley.     In Apple’s darkest hour, Steve Jobs came back, eventually turning the computer maker into the world’s most valuable corporation. In April, Mark Pincus stepped back into the chief executive role at Zynga. And Jack Dorsey, a co-founder of Twitter, has twice returned to help right the social media company’s ship.