Optimize memory allocation for client buffer; add VLD to detect memory on Windows.

example/rest/book_async_client/main.cc

@@ -101,7 +101,7 @@ int main(int argc, char* argv[]) {
     return 1;
   }
 
-  LOG_INIT("", webcc::LOG_CONSOLE);
+  WEBCC_LOG_INIT("", webcc::LOG_CONSOLE);
 
   std::string host = argv[1];
   std::string port = argv[2];