More source headers harmonization

* fix missing #ifdefs
* remove spaces and page feeds
* follow same set of rules everywhere, with cdio includes coming
  after standard C includes.

test/test_lib_driver_util.c

@@ -15,20 +15,22 @@
   along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 /* Unit test for lib/driver/util.c */
-
-#include <cdio/version.h>
-
 #ifdef HAVE_CONFIG_H
-# include "config.h"
-# define __CDIO_CONFIG_H__ 1
+#include "config.h"
+#define __CDIO_CONFIG_H__ 1
 #endif
+
 #ifdef HAVE_STDIO_H
 #include <stdio.h>
 #endif
 #ifdef HAVE_STDLIB_H
 #include <stdlib.h>
 #endif
+#ifdef HAVE_STRING_H
 #include <string.h>
+#endif
+
+#include <cdio/version.h>
 
 int
 main(int argc, const char *argv[])