Adding changes file for 16189.

changes/ticket16189

+ o Features (crypto, testing):
+   - Now that OpenSSL has its own scrypt implementation, add an unit
+     test that checks for interoperability between libscrypt_scrypt()
+     and OpenSSL's EVP_PBE_scrypt() so that we could not use libscrypt
+     and rely on EVP_PBE_scrypt() whenever possible. Resolves ticket
+     16189.