CQLSH unicode control character list is too liberal
CQLSH unicode control character list is too liberal

patch by Tanuj Nayak; reviewed by Berenguer Blasi, Brandon Williams for CASSANDRA-17617

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