toggle_rcvar
{MSG_enable_sshd, CONFIGOPT_SSHD, "sshd", toggle_rcvar, NULL},
{MSG_enable_ntpd, CONFIGOPT_NTPD, "ntpd", toggle_rcvar, NULL},
{MSG_run_ntpdate, CONFIGOPT_NTPDATE, "ntpdate", toggle_rcvar, NULL},
{MSG_enable_xdm, CONFIGOPT_XDM, "xdm", toggle_rcvar, NULL},
{MSG_enable_cgd, CONFIGOPT_CGD, "cgd", toggle_rcvar, NULL},
{MSG_enable_lvm, CONFIGOPT_LVM, "lvm", toggle_rcvar, NULL},
{MSG_enable_raid, CONFIGOPT_RAIDFRAME, "raidframe", toggle_rcvar, NULL},
toggle_rcvar(menu, arg);
static int toggle_rcvar(struct menudesc *, void *);