sysctl_find_oidname
p = sysctl_find_oidname(oidp->oid_name, parent);
p = sysctl_find_oidname(name, &parent->oid_children);
oidp = sysctl_find_oidname(escaped, parent);
oidp = sysctl_find_oidname(oid->oid_name, parent);