SPDX-ify licenses

rabbit.egg

@@ -1,6 +1,6 @@
 ;; -*- lisp-data -*-
 ((synopsis "Rabbit stream cipher.")
- (license "Public Domain")
+ (license "Unlicense")
  (category crypt)
  (test-dependencies test)
  (maintainer "Lilianna Smólska")

rabbit.scm

@@ -4,6 +4,8 @@
 ;; key is 128 bit == 16 characters
 ;; iv is 64 bit = 8 characters
 
+;;; SPDX-License-Identifier: Unlicense
+
 ;; Based on lambdanative rabbit lib, ported to Chicken Scheme by Ivan Raikov
 
 (define debuglevel (make-parameter 0))

rabbit.sld

@@ -1,3 +1,4 @@
+;;; SPDX-License-Identifier: Unlicense
 (define-library rabbit
   (import
    (scheme base)

rabbitlib.c

@@ -1,6 +1,7 @@
 // Rabbit stream cipher 
 // written by Martin Boesgaard, Mette Vesterager, Thomas Christensen and Erik Zenner
 // public domain
+// SPDX-License-Identifier: Unlicense
 
 #include <stdio.h>
 #include <stdlib.h>