auto_ptr → unique_ptr

Change the few occurrences of the deprecated `auto_ptr` to c++11 `unique_ptr`.
Silences the deprecation warnings.

Also add a missing `std::` for consistency.

src/httpserver.cpp

@@ -217,7 +217,7 @@ static std::string RequestMethodString(HTTPRequest::RequestMethod m)
 /** HTTP request callback */
 static void http_request_cb(struct evhttp_request* req, void* arg)
 {
-    std::auto_ptr<HTTPRequest> hreq(new HTTPRequest(req));
+    std::unique_ptr<HTTPRequest> hreq(new HTTPRequest(req));
 
     LogPrint("http", "Received a %s request for %s from %s\n",
              RequestMethodString(hreq->GetRequestMethod()), hreq->GetURI(), hreq->GetPeer().ToString());
@@ -253,7 +253,7 @@ static void http_request_cb(struct evhttp_request* req, void* arg)
 
     // Dispatch to worker thread
     if (i != iend) {
-        std::auto_ptr<HTTPWorkItem> item(new HTTPWorkItem(hreq.release(), path, i->handler));
+        std::unique_ptr<HTTPWorkItem> item(new HTTPWorkItem(hreq.release(), path, i->handler));
         assert(workQueue);
         if (workQueue->Enqueue(item.get()))
             item.release(); /* if true, queue took ownership */

src/miner.cpp

@@ -110,7 +110,7 @@ CBlockTemplate* CreateNewBlock(const CScript& scriptPubKeyIn)
 {
     const CChainParams& chainparams = Params();
     // Create new block
-    unique_ptr<CBlockTemplate> pblocktemplate(new CBlockTemplate());
+    std::unique_ptr<CBlockTemplate> pblocktemplate(new CBlockTemplate());
     if(!pblocktemplate.get())
         return NULL;
     CBlock *pblock = &pblocktemplate->block; // pointer for convenience

src/rpcmining.cpp

@@ -206,9 +206,9 @@ UniValue generate(const UniValue& params, bool fHelp)
     while (nHeight < nHeightEnd)
     {
 #ifdef ENABLE_WALLET
-        unique_ptr<CBlockTemplate> pblocktemplate(CreateNewBlockWithKey(reservekey));
+        std::unique_ptr<CBlockTemplate> pblocktemplate(CreateNewBlockWithKey(reservekey));
 #else
-        unique_ptr<CBlockTemplate> pblocktemplate(CreateNewBlockWithKey());
+        std::unique_ptr<CBlockTemplate> pblocktemplate(CreateNewBlockWithKey());
 #endif
         if (!pblocktemplate.get())
             throw JSONRPCError(RPC_INTERNAL_ERROR, "Wallet keypool empty");