tests: fix license on several tests

The use of GPLv2+ was a relic of copy-and-paste, and not intentional.

* tests/test-des.c: Update to GPLv3+.
* tests/test-flock.c: Likewise.
* tests/test-fsync.c: Likewise.
* tests/test-futimens.h: Likewise.
* tests/test-gc-arcfour.c: Likewise.
* tests/test-gc-arctwo.c: Likewise.
* tests/test-gc-des.c: Likewise.
* tests/test-gc-hmac-md5.c: Likewise.
* tests/test-gc-hmac-sha1.c: Likewise.
* tests/test-gc-md2.c: Likewise.
* tests/test-gc-md4.c: Likewise.
* tests/test-gc-md5.c: Likewise.
* tests/test-gc-pbkdf2-sha1.c: Likewise.
* tests/test-gc-rijndael.c: Likewise.
* tests/test-gc-sha1.c: Likewise.
* tests/test-gc.c: Likewise.
* tests/test-getcwd.c: Likewise.
* tests/test-link.c: Likewise.
* tests/test-link.h: Likewise.
* tests/test-lutimens.h: Likewise.
* tests/test-md2.c: Likewise.
* tests/test-md4.c: Likewise.
* tests/test-mkdir.h: Likewise.
* tests/test-rename.c: Likewise.
* tests/test-rename.h: Likewise.
* tests/test-safe-alloc.c: Likewise.
* tests/test-utimens-common.h: Likewise.
* tests/test-utimens.h: Likewise.

Signed-off-by: Eric Blake <ebb9@byu.net>

1 files changed, 1 insertions, 1 deletions

diff --git a/tests/test-md2.c b/tests/test-md2.c
index 5aaa168ba3..c53e8d3f27 100644
--- a/tests/test-md2.c
+++ b/tests/test-md2.c
@@ -3,7 +3,7 @@
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2, or (at your option)
+ * the Free Software Foundation; either version 3, or (at your option)
  * any later version.
  *
  * This program is distributed in the hope that it will be useful,