C++11: s/boost::scoped_ptr/std::unique_ptr/

src/main.cpp

@@ -196,7 +196,7 @@ namespace {
      *
      * Memory used: 1.3 MB
      */
-    boost::scoped_ptr<CRollingBloomFilter> recentRejects;
+    std::unique_ptr<CRollingBloomFilter> recentRejects;
     uint256 hashRecentRejectsChainTip;
 
     /** Blocks that are in flight, and that are in the queue to be downloaded. Protected by cs_main. */