rval= client->root->callback->interface.v1.delete(cookie, key, keylen, cas);
if (rval == PROTOCOL_BINARY_RESPONSE_SUCCESS &&
header->request.opcode == PROTOCOL_BINARY_CMD_DELETE)
rval= client->root->callback->interface.v1.delete(cookie, key, keylen, cas);
if (rval == PROTOCOL_BINARY_RESPONSE_SUCCESS &&
header->request.opcode == PROTOCOL_BINARY_CMD_DELETE)