Add fixUnburnableNFToken feature (#4391)

Author: ledhed2222

src/ripple/protocol/Feature.h

@@ -74,7 +74,7 @@ namespace detail {
 // Feature.cpp. Because it's only used to reserve storage, and determine how
 // large to make the FeatureBitset, it MAY be larger. It MUST NOT be less than
 // the actual number of amendments. A LogicError on startup will verify this.
-static constexpr std::size_t numFeatures = 56;
+static constexpr std::size_t numFeatures = 57;
 
 /** Amendments that this server supports and the default voting behavior.
    Whether they are enabled depends on the Rules defined in the validated
@@ -343,6 +343,7 @@ extern uint256 const featureImmediateOfferKilled;
 extern uint256 const featureDisallowIncoming;
 extern uint256 const featureXRPFees;
 extern uint256 const fixUniversalNumber;
+extern uint256 const fixUnburnableNFToken;
 
 }  // namespace ripple
 

src/ripple/protocol/impl/Feature.cpp

@@ -453,6 +453,7 @@ REGISTER_FEATURE(ImmediateOfferKilled,          Supported::yes, DefaultVote::no)
 REGISTER_FEATURE(DisallowIncoming,              Supported::yes, DefaultVote::no);
 REGISTER_FEATURE(XRPFees,                       Supported::yes, DefaultVote::no);
 REGISTER_FIX    (fixUniversalNumber,            Supported::yes, DefaultVote::no);
+REGISTER_FIX    (fixUnburnableNFToken,          Supported::yes, DefaultVote::no);
 
 // The following amendments have been active for at least two years. Their
 // pre-amendment code has been removed and the identifiers are deprecated.