Merge branch 'master' into staging-next

There ver very many conflicts, basically all due to
name -> pname+version.  Fortunately, almost everything was auto-resolved
by kdiff3, and for now I just fixed up a couple evaluation problems,
as verified by the tarball job.  There might be some fallback to these
conflicts, but I believe it should be minimal.

Hydra nixpkgs: ?compare=1538299

pkgs/tools/system/runit/default.nix

@@ -54,7 +54,7 @@ stdenv.mkDerivation rec {
     description = "UNIX init scheme with service supervision";
     license = licenses.bsd3;
     homepage = http://smarden.org/runit;
-    maintainers = with maintainers; [ rickynils joachifm ];
+    maintainers = with maintainers; [ joachifm ];
     platforms = platforms.linux;
   };
 }