New 'checkpoints' option should default to true.

src/checkpoints.cpp

@@ -39,7 +39,7 @@ namespace Checkpoints
 
     bool CheckBlock(int nHeight, const uint256& hash)
     {
-        if (!GetBoolArg("-checkpoints", false))
+        if (!GetBoolArg("-checkpoints", true))
             return true;
 
         MapCheckpoints& checkpoints = (fTestNet ? mapCheckpointsTestnet : mapCheckpoints);
@@ -51,7 +51,7 @@ namespace Checkpoints
 
     int GetTotalBlocksEstimate()
     {
-        if (!GetBoolArg("-checkpoints", false))
+        if (!GetBoolArg("-checkpoints", true))
             return 0;
 
         MapCheckpoints& checkpoints = (fTestNet ? mapCheckpointsTestnet : mapCheckpoints);
@@ -61,7 +61,7 @@ namespace Checkpoints
 
     CBlockIndex* GetLastCheckpoint(const std::map<uint256, CBlockIndex*>& mapBlockIndex)
     {
-        if (!GetBoolArg("-checkpoints", false))
+        if (!GetBoolArg("-checkpoints", true))
             return NULL;
 
         MapCheckpoints& checkpoints = (fTestNet ? mapCheckpointsTestnet : mapCheckpoints);