bump docker/docker to master and unfork dependencies

This patch updates all dependencies to match what is
used in moby/moby. Making the dependencies match
what is used in that repository makes sure we test
with the same version as libnetwork is later built
with in moby.

This also gets rid of some temporary forks that were
needed during the migration of Sirupsen/logrus to
sirupsen/logrus.

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

libnetwork/vendor/github.com/golang/protobuf/proto/clone.go

@@ -30,7 +30,7 @@
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 // Protocol buffer deep copy and merge.
-// TODO: MessageSet and RawMessage.
+// TODO: RawMessage.
 
 package proto
 
@@ -75,17 +75,24 @@ func Merge(dst, src Message) {
 }
 
 func mergeStruct(out, in reflect.Value) {
+	sprop := GetProperties(in.Type())
 	for i := 0; i < in.NumField(); i++ {
 		f := in.Type().Field(i)
 		if strings.HasPrefix(f.Name, "XXX_") {
 			continue
 		}
-		mergeAny(out.Field(i), in.Field(i))
+		mergeAny(out.Field(i), in.Field(i), false, sprop.Prop[i])
 	}
 
-	if emIn, ok := in.Addr().Interface().(extendableProto); ok {
-		emOut := out.Addr().Interface().(extendableProto)
-		mergeExtension(emOut.ExtensionMap(), emIn.ExtensionMap())
+	if emIn, ok := extendable(in.Addr().Interface()); ok {
+		emOut, _ := extendable(out.Addr().Interface())
+		mIn, muIn := emIn.extensionsRead()
+		if mIn != nil {
+			mOut := emOut.extensionsWrite()
+			muIn.Lock()
+			mergeExtension(mOut, mIn)
+			muIn.Unlock()
+		}
 	}
 
 	uf := in.FieldByName("XXX_unrecognized")
@@ -98,7 +105,10 @@ func mergeStruct(out, in reflect.Value) {
 	}
 }
 
-func mergeAny(out, in reflect.Value) {
+// mergeAny performs a merge between two values of the same type.
+// viaPtr indicates whether the values were indirected through a pointer (implying proto2).
+// prop is set if this is a struct field (it may be nil).
+func mergeAny(out, in reflect.Value, viaPtr bool, prop *Properties) {
 	if in.Type() == protoMessageType {
 		if !in.IsNil() {
 			if out.IsNil() {
@@ -112,7 +122,21 @@ func mergeAny(out, in reflect.Value) {
 	switch in.Kind() {
 	case reflect.Bool, reflect.Float32, reflect.Float64, reflect.Int32, reflect.Int64,
 		reflect.String, reflect.Uint32, reflect.Uint64:
+		if !viaPtr && isProto3Zero(in) {
+			return
+		}
 		out.Set(in)
+	case reflect.Interface:
+		// Probably a oneof field; copy non-nil values.
+		if in.IsNil() {
+			return
+		}
+		// Allocate destination if it is not set, or set to a different type.
+		// Otherwise we will merge as normal.
+		if out.IsNil() || out.Elem().Type() != in.Elem().Type() {
+			out.Set(reflect.New(in.Elem().Elem().Type())) // interface -> *T -> T -> new(T)
+		}
+		mergeAny(out.Elem(), in.Elem(), false, nil)
 	case reflect.Map:
 		if in.Len() == 0 {
 			return
@@ -127,7 +151,7 @@ func mergeAny(out, in reflect.Value) {
 			switch elemKind {
 			case reflect.Ptr:
 				val = reflect.New(in.Type().Elem().Elem())
-				mergeAny(val, in.MapIndex(key))
+				mergeAny(val, in.MapIndex(key), false, nil)
 			case reflect.Slice:
 				val = in.MapIndex(key)
 				val = reflect.ValueOf(append([]byte{}, val.Bytes()...))
@@ -143,13 +167,21 @@ func mergeAny(out, in reflect.Value) {
 		if out.IsNil() {
 			out.Set(reflect.New(in.Elem().Type()))
 		}
-		mergeAny(out.Elem(), in.Elem())
+		mergeAny(out.Elem(), in.Elem(), true, nil)
 	case reflect.Slice:
 		if in.IsNil() {
 			return
 		}
 		if in.Type().Elem().Kind() == reflect.Uint8 {
 			// []byte is a scalar bytes field, not a repeated field.
+
+			// Edge case: if this is in a proto3 message, a zero length
+			// bytes field is considered the zero value, and should not
+			// be merged.
+			if prop != nil && prop.proto3 && in.Len() == 0 {
+				return
+			}
+
 			// Make a deep copy.
 			// Append to []byte{} instead of []byte(nil) so that we never end up
 			// with a nil result.
@@ -167,7 +199,7 @@ func mergeAny(out, in reflect.Value) {
 		default:
 			for i := 0; i < n; i++ {
 				x := reflect.Indirect(reflect.New(in.Type().Elem()))
-				mergeAny(x, in.Index(i))
+				mergeAny(x, in.Index(i), false, nil)
 				out.Set(reflect.Append(out, x))
 			}
 		}
@@ -184,7 +216,7 @@ func mergeExtension(out, in map[int32]Extension) {
 		eOut := Extension{desc: eIn.desc}
 		if eIn.value != nil {
 			v := reflect.New(reflect.TypeOf(eIn.value)).Elem()
-			mergeAny(v, reflect.ValueOf(eIn.value))
+			mergeAny(v, reflect.ValueOf(eIn.value), false, nil)
 			eOut.value = v.Interface()
 		}
 		if eIn.enc != nil {