Merge #13967: [walletdb] don't report minversion wallet entry as unknown

321159e53e don't report minversion wallet entry as unknown (Gregory Sanders)

Pull request description:

  It is known in WalletBatch::LoadWallet

Tree-SHA512: 82f7e12f48ae7d17317074ce5b5e27c70ba8334b04adbf7cc863f8169cc1aa460b9454571e2698aa00059c8c8f669fe19c0d40c4910dcded260ddca6ce78be9d

src/wallet/walletdb.cpp

@@ -509,7 +509,8 @@ ReadKeyValue(CWallet* pwallet, CDataStream& ssKey, CDataStream& ssValue,
                 strErr = "Error reading wallet database: Unknown non-tolerable wallet flags found";
                 return false;
             }
-        } else if (strType != "bestblock" && strType != "bestblock_nomerkle") {
+        } else if (strType != "bestblock" && strType != "bestblock_nomerkle" &&
+                strType != "minversion") {
             wss.m_unknown_records++;
         }
     } catch (...)