Server: Pass in device-mapper DeviceSet to server

This makes docker (but not docker-init) link to libdevmapper and will
allow it to use the DeviceSet

docker/docker.go

@@ -4,6 +4,7 @@ import (
 	"flag"
 	"fmt"
 	"github.com/dotcloud/docker"
+	"github.com/dotcloud/docker/devmapper"
 	"github.com/dotcloud/docker/utils"
 	"io/ioutil"
 	"log"
@@ -133,7 +134,7 @@ func daemon(pidfile string, flGraphPath string, protoAddrs []string, autoRestart
 	if flDns != "" {
 		dns = []string{flDns}
 	}
-	server, err := docker.NewServer(flGraphPath, autoRestart, enableCors, dns)
+	server, err := docker.NewServer(flGraphPath, devmapper.NewDeviceSetDM(flGraphPath), autoRestart, enableCors, dns)
 	if err != nil {
 		return err
 	}

server.go

@@ -1294,7 +1294,7 @@ func (srv *Server) ContainerCopy(name string, resource string, out io.Writer) er
 
 }
 
-func NewServer(flGraphPath string, autoRestart, enableCors bool, dns ListOpts) (*Server, error) {
+func NewServer(flGraphPath string, deviceSet DeviceSet, autoRestart, enableCors bool, dns ListOpts) (*Server, error) {
 	if runtime.GOARCH != "amd64" {
 		log.Fatalf("The docker runtime currently only supports amd64 (not %s). This will change in the future. Aborting.", runtime.GOARCH)
 	}