BIP141: Commitment structure and deployment

Includes a fix by Suhas Daftuar and LongShao007

src/primitives/transaction.h

@@ -335,7 +335,6 @@ class CTransaction
 private:
     /** Memory only. */
     const uint256 hash;
-    void UpdateHash() const;
 
 public:
     // Default transaction version.
@@ -414,6 +413,8 @@ public:
     }
 
     std::string ToString() const;
+
+    void UpdateHash() const;
 };
 
 /** A mutable version of CTransaction. */