SIOCIFDESTROY
{.k_word = "destroy", .k_type = KW_T_INT, .k_int = SIOCIFDESTROY}
case SIOCIFDESTROY:
case SIOCIFDESTROY: {
(void)ioctl(s, SIOCIFDESTROY, &ifr);
if ((rv = rump_sys_ioctl(s, SIOCIFDESTROY, &ifr)) < 0) {