oidfmt
if (oidfmt(mib, len, fmt, &kind)) {
static int oidfmt(int *, size_t, char *, u_int *);
oidfmt(oid, nlen, fmt, &kind);
SYSCTL_NODE(_sysctl, CTL_SYSCTL_OIDFMT, oidfmt, CTLFLAG_RD | CTLFLAG_NOLOCK,