Sports bettors may get a little more “free play” from the state’s casinos and racetracks after Gov. Phil Murphy signed a bill giving their sports lounges a tax break on credits used to entice gamblers. Though the new law applies only to brick-and-mortar sports books, it allows online operators linked to New Jersey racetracks to get the same tax relief as sports books attached to casinos. The gaming credits bill passed during the lame duck session that ended when the new Legislature was sworn in earlier this month. Murphy signed it on Jan. 18. Online operators, like Points Bet, an Australian on…