8f093be374musig: use tagged hash for the list of pubkeys to aggregate (Jonas Nick)a6a768a4bfmusig: make key agg test vector more precise (Jonas Nick) Pull request description: Top commit has no ACKs. Tree-SHA512: 5369dc5b4039dd4cda2c50282db2882c088b96e1daa5801240f92be1832ed8f29317fdbfc3cab211707155c284a68dc593967f3141703e2544f6b8dc1553e44d