- Updated the version of doxyfile

- Preparation for 1.10 release

sample/sample.c

@@ -64,8 +64,7 @@ int main(int argc, char *argv)
 
     /* Initialize the parameters for the L-BFGS optimization. */
     lbfgs_parameter_init(&param);
-    //param.orthantwise_c = 1;
-    //param.linesearch = LBFGS_LINESEARCH_BACKTRACKING;
+    /*param.linesearch = LBFGS_LINESEARCH_BACKTRACKING;*/
 
     /*
         Start the L-BFGS optimization; this will invoke the callback functions