Remove dep. on docker and use mflag from common.

This reduces the number of dependencies, and avoids having docker as a vendored dependency, which should speed the build up.

.gitmodules

@@ -79,9 +79,6 @@
 [submodule "vendor/golang.org/x/sys"]
 	path = vendor/golang.org/x/sys
 	url = https://go.googlesource.com/sys
-[submodule "vendor/github.com/weaveworks/docker"]
-	path = vendor/github.com/weaveworks/docker
-	url = https://github.com/weaveworks/docker
 [submodule "vendor/github.com/beorn7/perks"]
 	path = vendor/github.com/beorn7/perks
 	url = https://github.com/beorn7/perks

common/mflagext/listvar.go

@@ -3,7 +3,7 @@ package mflagext
 import (
 	"fmt"
 
-	"github.com/weaveworks/docker/pkg/mflag"
+	"github.com/weaveworks/common/mflag"
 )
 
 type listOpts struct {

prog/weaveproxy/main.go

@@ -5,8 +5,8 @@ import (
 	"os"
 	"strings"
 
+	"github.com/weaveworks/common/mflag"
 	"github.com/weaveworks/common/signals"
-	"github.com/weaveworks/docker/pkg/mflag"
 	"github.com/weaveworks/weave/common"
 	"github.com/weaveworks/weave/common/mflagext"
 	"github.com/weaveworks/weave/proxy"

prog/weaver/main.go

@@ -13,8 +13,8 @@ import (
 
 	"github.com/gorilla/mux"
 	"github.com/pkg/profile"
+	"github.com/weaveworks/common/mflag"
 	"github.com/weaveworks/common/signals"
-	"github.com/weaveworks/docker/pkg/mflag"
 	"github.com/weaveworks/mesh"
 
 	"github.com/weaveworks/weave/common"