ninja-fix: CHANGES.txt for new 4.0.4 release candidate
ninja-fix: CHANGES.txt for new 4.0.4 release candidate

blambov/cassandra,jrwest/cassandra,jrwest/cassandra,mshuler/cassandra,blambov/cassandra,adelapena/cassandra,adelapena/cassandra,mike-tr-adamson/cassandra,mike-tr-adamson/cassandra,tjake/cassandra,mike-tr-adamson/cassandra,blambov/cassandra,tjake/cassandra,instaclustr/cassandra,tjake/cassandra,apache/cassandra,blambov/cassandra,apache/cassandra,mshuler/cassandra,jrwest/cassandra,adelapena/cassandra,apache/cassandra,adelapena/cassandra,mshuler/cassandra,tjake/cassandra,mshuler/cassandra,jrwest/cassandra,instaclustr/cassandra,apache/cassandra,instaclustr/cassandra,mike-tr-adamson/cassandra,instaclustr/cassandra