compound_compat: Accept marker value in serialize_value()
compound_compat: Accept marker value in serialize_value()

scylladb/scylla,avikivity/scylla,scylladb/scylla,duarten/scylla,avikivity/scylla,scylladb/scylla,duarten/scylla,scylladb/scylla,avikivity/scylla,duarten/scylla