Minor changes (#3909)

src/FurnaceRecipe.cpp

@@ -72,7 +72,7 @@ void cFurnaceRecipe::ReloadRecipes(void)
 		{
 			// There is a problem here on Android. Text files transferred from another OS may have a newline representation Android's implementation of getline doesn't expect
 			// Thus, part of a newline may be left in ParsingLine. ::empty() thus thinks the string isn't empty, and the below code outputs interesting errors since it was passed a nearly empty string
-			// Ref: http://stackoverflow.com/questions/6089231/getting-std-ifstream-to-handle-lf-cr-and-crlf
+			// Ref: https://stackoverflow.com/questions/6089231/getting-std-ifstream-to-handle-lf-cr-and-crlf
 			// TODO: There is a solution in the above reference, but it isn't very pretty. Fix it somehow.
 			continue;
 		}