Update go dep (#1560)

This fix updates go dep with `dep ensure --update` as well as the following:
- Removed github.com/ugorji/go restriction in Gopkg.toml (fixes  #1557)
- Added github.com/flynn/go-shlex in Makefile (neede by Caddy, maybe removed later)

This fix fixes #1557

Signed-off-by: Yong Tang <yong.tang.github@outlook.com>

vendor/github.com/gogo/protobuf/.travis.yml

@@ -1,7 +1,7 @@
 env:
   - PROTOBUF_VERSION=2.6.1
   - PROTOBUF_VERSION=3.0.2
-  - PROTOBUF_VERSION=3.4.0
+  - PROTOBUF_VERSION=3.5.1
 
 before_install:
   - ./install-protobuf.sh
@@ -10,11 +10,11 @@ before_install:
 script:
   - PATH=/home/travis/bin:$PATH make buildserverall
   - echo $TRAVIS_GO_VERSION
-  - if [ "$TRAVIS_GO_VERSION" == 1.9 ] && [[ "$PROTOBUF_VERSION" == 3.4.0 ]]; then ! git status --porcelain | read || (git status; git diff; exit 1); fi
+  - if [[ "$PROTOBUF_VERSION" == "3.5.1" ]] && [[ "$TRAVIS_GO_VERSION" =~ ^1\.9\.[0-9]+$ ]]; then ! git status --porcelain | read || (git status; git diff; exit 1); fi
 
 language: go
 
 go:
-  - 1.8.3
-  - 1.9
-
+  - 1.8.x
+  - 1.9.x
+  - 1.10beta1

vendor/github.com/gogo/protobuf/CONTRIBUTORS

@@ -11,6 +11,7 @@ John Shahid <jvshahid@gmail.com>
 John Tuley <john@tuley.org>
 Laurent <laurent@adyoulike.com>
 Patrick Lee <patrick@dropbox.com>
+Peter Edge <peter.edge@gmail.com>
 Roger Johansson <rogeralsing@gmail.com>
 Sam Nguyen <sam.nguyen@sendgrid.com>
 Sergio Arbeo <serabe@gmail.com>

vendor/github.com/gogo/protobuf/Makefile

@@ -88,6 +88,7 @@ regenerate:
 	make -C test/issue42order regenerate
 	make -C proto generate-test-pbs
 	make -C test/importdedup regenerate
+	make -C test/importduplicate regenerate
 	make -C test/custombytesnonstruct regenerate
 	make -C test/required regenerate
 	make -C test/casttype regenerate

vendor/github.com/gogo/protobuf/README

@@ -123,6 +123,7 @@ When the .proto file specifies `syntax="proto3"`, there are some differences:
 Consider file test.proto, containing
 
 ```proto
+	syntax = "proto2";
 	package example;
 	
 	enum FOO { X = 17; };

vendor/github.com/gogo/protobuf/Readme.md

@@ -43,8 +43,9 @@ These projects use gogoprotobuf:
   - <a href="https://github.com/heroiclabs/nakama">nakama</a>
   - <a href="https://github.com/src-d/proteus">proteus</a>
   - <a href="https://github.com/go-graphite">carbonzipper stack</a>
-  - <a href="https://sendgrid.com/">SendGrid</a>
-  
+  - <a href="https://sendgrid.com/">sendgrid</a>
+  - <a href="https://github.com/zero-os/0-stor">zero-os/0-stor</a>
+
 Please let us know if you are using gogoprotobuf by posting on our <a href="https://groups.google.com/forum/#!topic/gogoprotobuf/Brw76BxmFpQ">GoogleGroup</a>.
 
 ### Mentioned
@@ -64,10 +65,10 @@ After that you can choose:
 
 ### Installation
 
-To install it, you must first have Go (at least version 1.6.3) installed (see [http://golang.org/doc/install](http://golang.org/doc/install)).  Go 1.8.3 and 1.9 are continuously tested.
+To install it, you must first have Go (at least version 1.6.3) installed (see [http://golang.org/doc/install](http://golang.org/doc/install)). Latest patch versions of Go 1.8, 1.9 and 1.10 are continuously tested.
 
 Next, install the standard protocol buffer implementation from [https://github.com/google/protobuf](https://github.com/google/protobuf).
-Most versions from 2.3.1 should not give any problems, but 2.6.1, 3.0.2 and 3.4.0 are continuously tested.
+Most versions from 2.3.1 should not give any problems, but 2.6.1, 3.0.2 and 3.5.1 are continuously tested.
 
 ### Speed
 
@@ -98,7 +99,23 @@ Installing any of these binaries is easy.  Simply run:
     go get github.com/gogo/protobuf/{binary}
     go get github.com/gogo/protobuf/gogoproto
 
-These binaries allow you to using gogoprotobuf [extensions](https://github.com/gogo/protobuf/blob/master/extensions.md).
+These binaries allow you to use gogoprotobuf [extensions](https://github.com/gogo/protobuf/blob/master/extensions.md). You can also use your own binary.
+
+To generate the code, you also need to set the include path properly.
+
+    protoc -I=. -I=$GOPATH/src -I=$GOPATH/src/github.com/gogo/protobuf/protobuf --{binary}_out=. myproto.proto
+
+To use proto files from "google/protobuf" you need to add additional args to protoc.
+
+    protoc -I=. -I=$GOPATH/src -I=$GOPATH/src/github.com/gogo/protobuf/protobuf --{binary}_out=\
+    Mgoogle/protobuf/any.proto=github.com/gogo/protobuf/types,\
+    Mgoogle/protobuf/duration.proto=github.com/gogo/protobuf/types,\
+    Mgoogle/protobuf/struct.proto=github.com/gogo/protobuf/types,\
+    Mgoogle/protobuf/timestamp.proto=github.com/gogo/protobuf/types,\
+    Mgoogle/protobuf/wrappers.proto=github.com/gogo/protobuf/types:. \
+    myproto.proto
+    
+Note that in the protoc command, {binary} does not contain the initial prefix of "protoc-gen".
 
 ### Most Speed and most customization
 

vendor/github.com/gogo/protobuf/extensions.md

@@ -81,7 +81,7 @@ Helper methods, functions and interfaces can be generated by triggering certain
 <table>
 <tr><td><b>Name</b></td><td><b>Option</b></td><td><b>Type</b></td><td><b>Description</b></td><td><b>Default</b></td></tr>
 <tr><td><a href="http://godoc.org/github.com/gogo/protobuf/plugin/gostring">gostring</a></td><td> Message </td><td> bool </td><td> if true, a `GoString` method is generated. This returns a string representing valid go code to reproduce the current state of the struct. </td><td> false </td></tr>
-<tr><td><a href="http://godoc.org/github.com/gogo/protobuf/plugin/union"> onlyone</a> (deprecated) </td><td> Message </td><td> bool </td><td> if true, all fields must be nullable and only one of the fields may be set, like a union. Two methods are generated: `GetValue() interface{}` and `SetValue(v interface{}) (set bool)`. These provide easier interaction with a union. </td><td> false </td></tr>
+<tr><td><a href="http://godoc.org/github.com/gogo/protobuf/plugin/union"> onlyone</a> </td><td> Message </td><td> bool </td><td> if true, all fields must be nullable and only one of the fields may be set, like a union. Two methods are generated: `GetValue() interface{}` and `SetValue(v interface{}) (set bool)`. These provide easier interaction with a union. </td><td> false </td></tr>
 <tr><td><a href="http://godoc.org/github.com/gogo/protobuf/plugin/equal"> equal</a></td><td> Message </td><td> bool </td><td> if true, an Equal method is generated </td><td> false </td></tr>
 <tr><td><a href="http://godoc.org/github.com/gogo/protobuf/plugin/compare"> compare</a></td><td> Message </td><td> bool </td><td> if true, a Compare method is generated.  This is very useful for quickly implementing sort on a list of protobuf structs </td><td> false </td></tr>
 <tr><td><a href="http://godoc.org/github.com/gogo/protobuf/plugin/equal"> verbose_equal</a> </td><td> Message </td><td> bool </td><td> if true, a verbose equal method is generated for the message. This returns an error which describes the exact element which is not equal to the exact element in the other struct. </td><td> false </td></tr>

vendor/github.com/gogo/protobuf/install-protobuf.sh

@@ -26,7 +26,3 @@ case "$PROTOBUF_VERSION" in
     die "unknown protobuf version: $PROTOBUF_VERSION"
     ;;
 esac
-
-
-
-

vendor/github.com/gogo/protobuf/proto/discard.go

@@ -0,0 +1,151 @@
+// Go support for Protocol Buffers - Google's data interchange format
+//
+// Copyright 2017 The Go Authors.  All rights reserved.
+// https://github.com/golang/protobuf
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+package proto
+
+import (
+	"fmt"
+	"reflect"
+	"strings"
+)
+
+// DiscardUnknown recursively discards all unknown fields from this message
+// and all embedded messages.
+//
+// When unmarshaling a message with unrecognized fields, the tags and values
+// of such fields are preserved in the Message. This allows a later call to
+// marshal to be able to produce a message that continues to have those
+// unrecognized fields. To avoid this, DiscardUnknown is used to
+// explicitly clear the unknown fields after unmarshaling.
+//
+// For proto2 messages, the unknown fields of message extensions are only
+// discarded from messages that have been accessed via GetExtension.
+func DiscardUnknown(m Message) {
+	discardLegacy(m)
+}
+
+func discardLegacy(m Message) {
+	v := reflect.ValueOf(m)
+	if v.Kind() != reflect.Ptr || v.IsNil() {
+		return
+	}
+	v = v.Elem()
+	if v.Kind() != reflect.Struct {
+		return
+	}
+	t := v.Type()
+
+	for i := 0; i < v.NumField(); i++ {
+		f := t.Field(i)
+		if strings.HasPrefix(f.Name, "XXX_") {
+			continue
+		}
+		vf := v.Field(i)
+		tf := f.Type
+
+		// Unwrap tf to get its most basic type.
+		var isPointer, isSlice bool
+		if tf.Kind() == reflect.Slice && tf.Elem().Kind() != reflect.Uint8 {
+			isSlice = true
+			tf = tf.Elem()
+		}
+		if tf.Kind() == reflect.Ptr {
+			isPointer = true
+			tf = tf.Elem()
+		}
+		if isPointer && isSlice && tf.Kind() != reflect.Struct {
+			panic(fmt.Sprintf("%T.%s cannot be a slice of pointers to primitive types", m, f.Name))
+		}
+
+		switch tf.Kind() {
+		case reflect.Struct:
+			switch {
+			case !isPointer:
+				panic(fmt.Sprintf("%T.%s cannot be a direct struct value", m, f.Name))
+			case isSlice: // E.g., []*pb.T
+				for j := 0; j < vf.Len(); j++ {
+					discardLegacy(vf.Index(j).Interface().(Message))
+				}
+			default: // E.g., *pb.T
+				discardLegacy(vf.Interface().(Message))
+			}
+		case reflect.Map:
+			switch {
+			case isPointer || isSlice:
+				panic(fmt.Sprintf("%T.%s cannot be a pointer to a map or a slice of map values", m, f.Name))
+			default: // E.g., map[K]V
+				tv := vf.Type().Elem()
+				if tv.Kind() == reflect.Ptr && tv.Implements(protoMessageType) { // Proto struct (e.g., *T)
+					for _, key := range vf.MapKeys() {
+						val := vf.MapIndex(key)
+						discardLegacy(val.Interface().(Message))
+					}
+				}
+			}
+		case reflect.Interface:
+			// Must be oneof field.
+			switch {
+			case isPointer || isSlice:
+				panic(fmt.Sprintf("%T.%s cannot be a pointer to a interface or a slice of interface values", m, f.Name))
+			default: // E.g., test_proto.isCommunique_Union interface
+				if !vf.IsNil() && f.Tag.Get("protobuf_oneof") != "" {
+					vf = vf.Elem() // E.g., *test_proto.Communique_Msg
+					if !vf.IsNil() {
+						vf = vf.Elem()   // E.g., test_proto.Communique_Msg
+						vf = vf.Field(0) // E.g., Proto struct (e.g., *T) or primitive value
+						if vf.Kind() == reflect.Ptr {
+							discardLegacy(vf.Interface().(Message))
+						}
+					}
+				}
+			}
+		}
+	}
+
+	if vf := v.FieldByName("XXX_unrecognized"); vf.IsValid() {
+		if vf.Type() != reflect.TypeOf([]byte{}) {
+			panic("expected XXX_unrecognized to be of type []byte")
+		}
+		vf.Set(reflect.ValueOf([]byte(nil)))
+	}
+
+	// For proto2 messages, only discard unknown fields in message extensions
+	// that have been accessed via GetExtension.
+	if em, ok := extendable(m); ok {
+		// Ignore lock since discardLegacy is not concurrency safe.
+		emm, _ := em.extensionsRead()
+		for _, mx := range emm {
+			if m, ok := mx.value.(Message); ok {
+				discardLegacy(m)
+			}
+		}
+	}
+}