IMSG_CTL_GET_STATS
case IMSG_CTL_GET_STATS:
m_compose(p, IMSG_CTL_GET_STATS, 0, 0, -1, kvp, sizeof *kvp);
srv_send(IMSG_CTL_GET_STATS, &kv, sizeof kv);
srv_recv(IMSG_CTL_GET_STATS);
CASE(IMSG_CTL_GET_STATS);