all: consistently include config.h

config.h should be included from every .c file, and it should be
included before any other include. Fix that.

(As a side effect of how I did this, this also changes us to
consistently use "config.h" rather than <config.h>. To the extent that
it matters [which is not much], quotes are more correct anyway, since
we're talking about a file in our own build tree, not a system
include.)

src/main-utils.c

@@ -19,7 +19,8 @@
  * Copyright (C) 2005 - 2008 Novell, Inc.
  */
 
-#include <config.h>
+#include "config.h"
+
 #include <stdio.h>
 #include <errno.h>
 #include <fcntl.h>