These functions are used to set up the necessary data to use the
scrypt KDF.
-For more information on scrypt, see L<EVP_KDF_SCRYPT(7)>.
+For more information on scrypt, see L<EVP_KDF-SCRYPT(7)>.
EVP_PKEY_CTX_set1_scrypt_salt() sets the B<saltlen> bytes long salt
value.