Add support for cgroupv2

Add support for cgroupv2 so it works with Docker Desktop 4.3 and newer.

Also Use golang 1.17.6

Fixes weaveworks#270

Makefile

@@ -1,5 +1,5 @@
 UID_GID?=$(shell id -u):$(shell id -g)
-GO_VERSION="1.12.6"
+GO_VERSION="1.17.6"
 
 all: binary
 

go.mod

@@ -2,21 +2,22 @@ module github.com/weaveworks/footloose
 
 require (
 	github.com/blang/semver v3.5.1+incompatible
-	github.com/docker/docker v1.13.1
+	github.com/containers/common v0.47.3
+	github.com/docker/docker v20.10.12+incompatible
 	github.com/docker/go-connections v0.4.0 // indirect
-	github.com/docker/go-units v0.3.3 // indirect
+	github.com/docker/go-units v0.4.0 // indirect
 	github.com/ghodss/yaml v1.0.0
 	github.com/google/go-github/v24 v24.0.1
-	github.com/gorilla/mux v1.7.3
+	github.com/gorilla/mux v1.8.0
 	github.com/inconshreveable/mousetrap v1.0.0 // indirect
 	github.com/mitchellh/go-homedir v1.1.0
-	github.com/pkg/errors v0.8.1
-	github.com/sirupsen/logrus v1.3.0
-	github.com/spf13/cobra v0.0.3
-	github.com/spf13/pflag v1.0.3 // indirect
-	github.com/stretchr/testify v1.2.2
-	golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2 // indirect
-	gopkg.in/yaml.v2 v2.2.2
+	github.com/pkg/errors v0.9.1
+	github.com/sirupsen/logrus v1.8.1
+	github.com/spf13/cobra v1.3.0
+	github.com/spf13/pflag v1.0.5 // indirect
+	github.com/stretchr/testify v1.7.0
+	golang.org/x/crypto v0.0.0-20211215153901-e495a2d5b3d3 // indirect
+	gopkg.in/yaml.v2 v2.4.0
 )
 
 go 1.13