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/applications/networking/cluster/docker-machine/kvm2.nix

@@ -1,6 +1,6 @@
-{ stdenv, buildGoPackage, libvirt, pkgconfig, minikube }:
+{ stdenv, buildGoModule, libvirt, pkgconfig, minikube }:
 
-buildGoPackage rec {
+buildGoModule rec {
   pname = "docker-machine-kvm2";
   version = minikube.version;
 
@@ -9,6 +9,8 @@ buildGoPackage rec {
 
   src = minikube.src;
 
+  modSha256 = minikube.go-modules.outputHash;
+
   nativeBuildInputs = [ pkgconfig ];
   buildInputs = [ libvirt ];
 
@@ -17,7 +19,7 @@ buildGoPackage rec {
   '';
 
   postInstall = ''
-    mv $bin/bin/kvm $bin/bin/docker-machine-driver-kvm2
+    mv $out/bin/kvm $out/bin/docker-machine-driver-kvm2
   '';
 
   meta = with stdenv.lib; {