gnu: tor: Use ‘license:’ prefix instead of #:select.

* gnu/packages/tor.scm (tor, torsocks, privoxy, onionshare)[license]:
Add prefix.

gnu/packages/tor.scm

@@ -20,7 +20,7 @@
 ;;; along with GNU Guix.  If not, see <http://www.gnu.org/licenses/>.
 
 (define-module (gnu packages tor)
-  #:use-module ((guix licenses) #:select (bsd-3 gpl3+ gpl2+ gpl2))
+  #:use-module ((guix licenses) #:prefix license:)
   #:use-module (guix packages)
   #:use-module (guix download)
   #:use-module (guix git-download)
@@ -73,7 +73,7 @@ (define-public tor
 which has not been designed for use with Tor such as ssh, will use only Tor for
 internet connectivity, and also ensures that there are no leaks from DNS, UDP or
 the application layer) you need to install @code{torsocks}.")
-    (license bsd-3)))
+    (license license:bsd-3)))
 
 (define-public torsocks
   (package
@@ -95,7 +95,7 @@ (define-public torsocks
 rejects UDP traffic from the application you're using.")
 
     ;; All the files explicitly say "version 2 only".
-    (license gpl2)))
+    (license license:gpl2)))
 
 (define-public privoxy
   (package
@@ -139,7 +139,7 @@ (define-public privoxy
 flexible configuration and can be customized to suit individual needs and
 tastes.  It has application for both stand-alone systems and multi-user
 networks.")
-    (license gpl2+)))
+    (license license:gpl2+)))
 
 (define-public onionshare
   (package
@@ -225,5 +225,5 @@ (define-public onionshare
 and use a Tor hidden service to make it temporarily accessible over the
 internet.  The other user just needs to use Tor Browser to download the file
 from you.")
-    (license (list gpl3+
-                   bsd-3)))) ; onionshare/socks.py
+    (license (list license:gpl3+
+                   license:bsd-3))))    ; onionshare/socks.py