Changed style of comments with asterisks to avoid highlighting errors on //* with weak highlighters, change is to all files that could potentially break highlights

Most were needed, though some were just for possible problems with highlighting, should not affect performance whatsoever.

indra/newview/llfloatermodelpreview.cpp

@@ -3186,7 +3186,7 @@ LLModelPreview::~LLModelPreview()
 		mModelLoader->mPreview = NULL;
 		mModelLoader = NULL;
 	}
-	//*HACK : *TODO : turn this back on when we understand why this crashes
+	// *HACK : *TODO : turn this back on when we understand why this crashes
 	//glodShutdown();
 }