Merge pull request #81 from ijc/no-default-hostname

Do not force default hostname `moby`.

cmd/moby/image.go

@@ -28,6 +28,7 @@ var exclude = map[string]bool{
 	"dev/console":  true,
 	"dev/pts":      true,
 	"dev/shm":      true,
+	"etc/hostname": true,
 }
 
 var replace = map[string]string{
@@ -43,7 +44,6 @@ nameserver 8.8.4.4
 nameserver 2001:4860:4860::8888
 nameserver 2001:4860:4860::8844
 `,
-	"etc/hostname": "moby",
 }
 
 // tarPrefix creates the leading directories for a path