PG&E Corp. can’t prevent its power lines from sparking the kinds of wildfires that have killed scores of Californians. So instead, it plans to pull the plug on a giant swath of the state’s population. No U.S. utility has ever blacked out so many people on purpose. PG&E says it could knock out power to as much as an eighth of the state’s population for as long as five days when dangerously high winds arise. Communities likely to get shut off worry PG&E will put people in danger, especially the sick and elderly,…