Enable time locked coin bases to be used as normal coinbase transactions with longer maturity, fix max_money

src/primitives/transaction.h

@@ -457,6 +457,8 @@ public:
         return (vin.size() == 1 && vin[0].prevout.IsNull());
     }
 
+    int64_t UnlockTime(uint32_t voutNum) const;
+
     friend bool operator==(const CTransaction& a, const CTransaction& b)
     {
         return a.hash == b.hash;