Use common licence attributes from lib/licenses.nix

Many (less easily automatically converted) old-style strings
remain.

Where there was any possible ambiguity about the exact version or
variant intended, nothing was changed. IANAL, nor a search robot.

Use `with stdenv.lib` wherever it makes sense.

pkgs/applications/networking/browsers/netsurf/netsurf.nix

@@ -23,12 +23,15 @@ stdenv.mkDerivation {
   buildPhase = "make PREFIX=$out";
   installPhase = "make PREFIX=$out install";
 
-  meta = { 
+  meta = with args.lib; {
     description = "free, open source web browser";
     homepage = http://www.netsurf-browser.org;
-    license = ["GPLv2" /* visual worrk : */ "MIT" ];
-    maintainers = [args.lib.maintainers.marcweber];
-    platforms = args.lib.platforms.linux;
+    license = with licenses; [
+      gpl2
+      mit /* visual work */
+    ];
+    maintainers = with maintainers; [ marcweber ];
+    platforms = platforms.linux;
   };
 
 }