The featured combatants in what is now known as the "Brawl at Symphony Hall" did not shake hands yesterday, but they did settle their differences. Michael J. Hallam and Matthew B. Ellinger, who gained national notoriety when they struggled with each other during a May 9 performance of the Boston Pops, both appeared in Boston Municipal Court, initially seeking criminal charges against each other. But after a 10-minute closed-door hearing, the two men and their lawyers emerged, and a court official later said they agreed not to pursue any charges against each other. The incident led to conductor Keith Lockhart...