ntreg_lf_record can have id "lf" (old-style hashes) or "lh" (new-
style hashes).
struct ntreg_lf_record {
int32_t seg_len;
struct ntreg_lf_record {
int32_t seg_len;
+ char id[2]; /* "lf"|"lh" */
uint16_t nr_keys; /* number of keys in this record */
struct {
uint32_t offset; /* offset of nk-record for this subkey */
uint16_t nr_keys; /* number of keys in this record */
struct {
uint32_t offset; /* offset of nk-record for this subkey */