Raise version of created blocks, and enforce DERSIG in mempool

src/main.cpp

@@ -792,7 +792,7 @@ bool CTxMemPool::accept(CValidationState &state, CTransaction &tx, bool fCheckIn
 
         // Check against previous transactions
         // This is done last to help prevent CPU exhaustion denial-of-service attacks.
-        if (!tx.CheckInputs(state, view, true, SCRIPT_VERIFY_P2SH | SCRIPT_VERIFY_STRICTENC))
+        if (!tx.CheckInputs(state, view, true, SCRIPT_VERIFY_P2SH | SCRIPT_VERIFY_STRICTENC | SCRIPT_VERIFY_DERSIG))
         {
             return error("CTxMemPool::accept() : ConnectInputs failed %s", hash.ToString().c_str());
         }

src/main.h

@@ -1268,7 +1268,7 @@ class CBlockHeader
 {
 public:
     // header
-    static const int CURRENT_VERSION=2;
+    static const int CURRENT_VERSION=3;
     int nVersion;
     uint256 hashPrevBlock;
     uint256 hashMerkleRoot;