key_getsah_ref
sah = key_getsah_ref(&saidx, CMP_REQID);
sah = key_getsah_ref(&saidx, CMP_REQID);
sah = key_getsah_ref(&saidx, CMP_REQID);
sah = key_getsah_ref(&saidx, CMP_HEAD);
sah = key_getsah_ref(&saidx, CMP_HEAD);
static struct secashead *key_getsah_ref(const struct secasindex *, int);