message: [Wallet] load Sapling hd chain from disk.
diff: @@ -724,6 +724,10 @@ bool ReadKeyValue(CWallet* pwallet, CDataStream& ssKey, CDataStream& ssValue, CW
  CHDChain chain;
  ssValue >> chain;
  pwallet->GetScriptPubKeyMan()->SetHDChain(chain, true);
  + } else if (strType == "hdchain_sap") {
  + CHDChain chain;
  + ssValue >> chain;
  + pwallet->GetSaplingScriptPubKeyMan()->SetHDChain(chain, true);
  } else if (strType == "sapzkey") {
  libzcash::SaplingIncomingViewingKey ivk;
  ssKey >> ivk;
  