[doc] Fix doxygen comments for members

src/main.cpp

@@ -194,10 +194,10 @@ namespace {
     /** Blocks that are in flight, and that are in the queue to be downloaded. Protected by cs_main. */
     struct QueuedBlock {
         uint256 hash;
-        CBlockIndex *pindex;  //! Optional.
-        int64_t nTime;  //! Time of "getdata" request in microseconds.
-        bool fValidatedHeaders;  //! Whether this block has validated headers at the time of request.
-        int64_t nTimeDisconnect; //! The timeout for this block request (for disconnecting a slow peer)
+        CBlockIndex* pindex;     //!< Optional.
+        int64_t nTime;           //!< Time of "getdata" request in microseconds.
+        bool fValidatedHeaders;  //!< Whether this block has validated headers at the time of request.
+        int64_t nTimeDisconnect; //!< The timeout for this block request (for disconnecting a slow peer)
     };
     map<uint256, pair<NodeId, list<QueuedBlock>::iterator> > mapBlocksInFlight;