bump version to 2013.57
diff --git a/sysoptions.h b/sysoptions.h
index 22c2a4d..3072d3d 100644
--- a/sysoptions.h
+++ b/sysoptions.h
@@ -4,7 +4,7 @@
  *******************************************************************/
 
 #ifndef DROPBEAR_VERSION
-#define DROPBEAR_VERSION "2013.56"
+#define DROPBEAR_VERSION "2013.57"
 #endif
 
 #define LOCAL_IDENT "SSH-2.0-dropbear_" DROPBEAR_VERSION