walletunlocker+keychain+config_builder: use new aezeed version

config_builder.go

@@ -965,14 +965,13 @@ func waitForWalletPassword(cfg *Config,
 		// seed. If it's greater than the current key derivation
 		// version, then we'll return an error as we don't understand
 		// this.
-		const latestVersion = keychain.KeyDerivationVersion
 		if cipherSeed != nil &&
-			cipherSeed.InternalVersion != latestVersion {
+			!keychain.IsKnownVersion(cipherSeed.InternalVersion) {
 
 			return nil, fmt.Errorf("invalid internal "+
-				"seed version %v, current version is %v",
+				"seed version %v, current max version is %v",
 				cipherSeed.InternalVersion,
-				keychain.KeyDerivationVersion)
+				keychain.CurrentKeyDerivationVersion)
 		}
 
 		loader, err := btcwallet.NewWalletLoader(