Revert "Remove CryptoConditionsSuite stub amendment:"

This reverts commit d3798f6290.

src/ripple/app/tx/impl/Escrow.cpp

@@ -147,7 +147,10 @@ EscrowCreate::preflight(PreflightContext const& ctx)
             return temMALFORMED;
         }
 
-        if (condition->type != Type::preimageSha256)
+        // Conditions other than PrefixSha256 require the
+        // "CryptoConditionsSuite" amendment:
+        if (condition->type != Type::preimageSha256 &&
+            !ctx.rules.enabled(featureCryptoConditionsSuite))
             return temDISABLED;
     }
 

src/ripple/protocol/Feature.h

@@ -83,7 +83,7 @@ class FeatureCollections
         "TickSize",
         "fix1368",
         "Escrow",
-        // "CryptoConditionsSuite",
+        "CryptoConditionsSuite",
         "fix1373",
         "EnforceInvariants",
         "SortedDirectories",
@@ -348,6 +348,7 @@ extern uint256 const featureOwnerPaysFee;
 extern uint256 const featureFlow;
 extern uint256 const featureCompareTakerFlowCross;
 extern uint256 const featureFlowCross;
+extern uint256 const featureCryptoConditionsSuite;
 extern uint256 const fix1513;
 extern uint256 const featureDepositAuth;
 extern uint256 const featureChecks;

src/ripple/protocol/impl/Feature.cpp

@@ -102,7 +102,7 @@ detail::supportedAmendments()
         "TickSize",
         "fix1368",
         "Escrow",
-        // "CryptoConditionsSuite", DO NOT REUSE
+        "CryptoConditionsSuite",
         "fix1373",
         "EnforceInvariants",
         "FlowCross",
@@ -165,6 +165,7 @@ uint256 const
     featureFlow                     = *getRegisteredFeature("Flow"),
     featureCompareTakerFlowCross    = *getRegisteredFeature("CompareTakerFlowCross"),
     featureFlowCross                = *getRegisteredFeature("FlowCross"),
+    featureCryptoConditionsSuite    = *getRegisteredFeature("CryptoConditionsSuite"),
     fix1513                         = *getRegisteredFeature("fix1513"),
     featureDepositAuth              = *getRegisteredFeature("DepositAuth"),
     featureChecks                   = *getRegisteredFeature("Checks"),