Misc: Indicate that licence is LGPL-2.1 or later

Also make the name of the licence more explicit.

diff --git a/README b/README
index 52e0e51..6cceff9 100644 (file)
--- a/README
+++ b/README
@@ -3,7 +3,8 @@ libusbx
 
 libusbx is a library for USB device access from Linux, Mac OS X,
 OpenBSD and Windows userspace.
-It is written in C and licensed under the LGPL-2.1 (see COPYING).
+It is written in C and licensed under the GNU Lesser General Public
+License version 2.1 or (at your option) any later version (see COPYING).
 
 libusbx is abstracted internally in such a way that it can hopefully
 be ported to other operating systems. Please see the PORTING file