Fix byte order warning

This commit fixes a byte order warning for both sha1.c and md5.c like so:

sha1.c:127:6: warning: #warning Undetermined or unsupported Byte Order... We will try LITTLE_ENDIAN [-Wcpp]

Also removed a couple of header includes that appear not be needed.

client/fwknop.c

@@ -28,7 +28,6 @@
  *
  *****************************************************************************
 */
-#include "fko.h"
 #include "fwknop.h"
 #include "config_init.h"
 #include "spa_comm.h"

client/fwknop_common.h

@@ -32,7 +32,6 @@
 #define FWKNOP_COMMON_H
 
 #include "common.h"
-#include "fko_limits.h"
 
 /* My Name and Version
 */

lib/cipher_funcs.h

@@ -31,7 +31,6 @@
 #ifndef CIPHER_FUNCS_H
 #define CIPHER_FUNCS_H 1
 
-#include "fko.h"
 #include "rijndael.h"
 #include "gpgme_funcs.h"
 

lib/md5.c

@@ -28,6 +28,7 @@
  *****************************************************************************
 */
 #include "md5.h"
+#include "fko_common.h"
 
 #if BYTEORDER == 1234
   #define byteReverse(buf, len)    /* Nothing */

lib/sha1.c

@@ -17,6 +17,7 @@
  *****************************************************************************
 */
 #include "sha1.h"
+#include "fko_common.h"
 
 /* SHA f()-functions */
 #define f1(x,y,z)    ((x & y) | (~x & z))