licenses: Add Open Government Licence for Public Sector Information.

* guix/licenses.scm (ogl-psi1.0): New variable.

Signed-off-by: Guillaume Le Vaillant <glv@posteo.net>

guix/licenses.scm

@@ -75,6 +75,7 @@ (define-module (guix licenses)
             ms-pl
             ncsa
             nmap
+            ogl-psi1.0
             openldap2.8 openssl
             perl-license
             psfl public-domain
@@ -517,6 +518,11 @@ (define nmap
            "https://svn.nmap.org/nmap/COPYING"
            "https://fedoraproject.org/wiki/Licensing/Nmap"))
 
+(define ogl-psi1.0
+  (license "Open Government Licence for Public Sector Information"
+           "https://www.nationalarchives.gov.uk/doc/open-government-licence/version/1/"
+           #f))
+
 (define openssl
   (license "OpenSSL"
            "http://directory.fsf.org/wiki/License:OpenSSL"