fix some printf -> LogPrintf leftovers

src/util.cpp

@@ -198,15 +198,7 @@ uint256 GetRandHash()
     return hash;
 }
 
-
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-//
-// OutputDebugStringF (aka printf -- there is a #define that we really
-// should get rid of one day) has been broken a couple of times now
+// LogPrintf() has been broken a couple of times now
 // by well-meaning people adding mutexes in the most straightforward way.
 // It breaks because it may be called by global destructors during shutdown.
 // Since the order of destruction of static/global objects is undefined,
@@ -1065,7 +1057,7 @@ const boost::filesystem::path &GetDataDir(bool fNetSpecific)
 
     fs::path &path = pathCached[nNet];
 
-    // This can be called during exceptions by printf, so we cache the
+    // This can be called during exceptions by LogPrintf(), so we cache the
     // value so we don't have to do memory allocations after that.
     if (!path.empty())
         return path;