CET_MULTIPART
assert(ws->parent_entry->params->entry_type == CET_MULTIPART);
assert(ws->parent_entry->params->entry_type == CET_MULTIPART);
assert(entry->params->entry_type == CET_MULTIPART);
case CET_MULTIPART:
assert(entry->params->entry_type == CET_MULTIPART);
assert(ws->parent_entry->params->entry_type == CET_MULTIPART);
mp_params.cep.entry_type = CET_MULTIPART;