BOSTON (Reuters) - Massachusetts Republicans have launched a pre-emptive strike against Democratic Attorney General Tom Reilly by snapping up online Internet addresses that would have been obvious picks for him if he decides to run for governor in 2006. Reilly has not yet said whether he will challenge Republican Governor Mitt Romney in 2006. But if Reilly does run, it will be hard for him to use the Web sites reillyforgovernor.com, tomreillyforgovernor.com, reillyforgovernor2006.com and reillyforgovernor06.com. That's because the state Republican Party registered those domain names last week, the Boston Herald newspaper reported on Monday. "It was bought with the intention...