Merge #9906: Disallow copy constructor CReserveKeys

188f89c Disallow copy of CReserveKeys (Gregory Sanders)

Tree-SHA512: e55ce10bf7f2dc91de9797e60ab7767fb51f25255995d62ddf358c52b7aaa23c26fbfb522e1610ff950b86804ddbc38dc0d7708bfab2c4d33ad99a275d8c77db

src/wallet/wallet.h

@@ -1036,6 +1036,10 @@ public:
         pwallet = pwalletIn;
     }
 
+    CReserveKey() = default;
+    CReserveKey(const CReserveKey&) = delete;
+    CReserveKey& operator=(const CReserveKey&) = delete;
+
     ~CReserveKey()
     {
         ReturnKey();