Make skipping BIP30 check chain agnostic

src/consensus/params.h

@@ -19,6 +19,9 @@ struct Params {
     int nMajorityEnforceBlockUpgrade;
     int nMajorityRejectBlockOutdated;
     int nMajorityWindow;
+    /** Block height and hash at which BIP34 becomes active */
+    int BIP34Height;
+    uint256 BIP34Hash;
     /** Proof of work parameters */
     uint256 powLimit;
     bool fPowAllowMinDifficultyBlocks;