[PATCH] Add Zope Public License.

[Ricardo Wurmus]

>From ccc79ada2f48569a57cb310040e38d4c52904171 Mon Sep 17 00:00:00 2001
From: Ricardo Wurmus <ricardo.wur...@mdc-berlin.de>
Date: Tue, 22 Sep 2015 13:43:53 +0200
Subject: [PATCH] licenses: Add Zope Public License.

* guix/licenses.scm (zpl2.1): New variable.
---
 guix/licenses.scm | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/guix/licenses.scm b/guix/licenses.scm
index c3b76af..7e05b32 100644
--- a/guix/licenses.scm
+++ b/guix/licenses.scm
@@ -61,6 +61,7 @@
             sleepycat
             vim
             x11 x11-style
+            zpl2.1
             zlib
             fsf-free))
 
@@ -382,6 +383,11 @@ which may be a file:// URI pointing the package's tree."
             "Check the URI for details.  "
             comment)))
 
+(define zpl2.1
+  (license "Zope Public License 2.1"
+           "http://directory.fsf.org/wiki?title=License:ZopePLv2.1";
+           "https://www.gnu.org/licenses/license-list.html#Zope2.0";))
+
 (define zlib
   (license "Zlib"
            "http://www.gzip.org/zlib/zlib_license.html";
-- 
2.1.0