Use weaveworks/docker/pkg/mflag everywhere

prog/weaveproxy/main.go

@@ -5,7 +5,7 @@ import (
 	"os"
 	"strings"
 
-	"github.com/docker/docker/pkg/mflag"
+	"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

@@ -11,9 +11,9 @@ import (
 	"strings"
 	"time"
 
-	"github.com/docker/docker/pkg/mflag"
 	"github.com/gorilla/mux"
 	"github.com/pkg/profile"
+	"github.com/weaveworks/docker/pkg/mflag"
 	"github.com/weaveworks/mesh"
 
 	"github.com/weaveworks/weave/common"