Update protobuf,grpc,etcd dependencies

1. Updated etcd/protobuf/grpc dependencies:

echo "
hack/pin-dependency.sh github.com/golang/protobuf latest
hack/pin-dependency.sh google.golang.org/protobuf latest
hack/pin-dependency.sh go.etcd.io/etcd/api/v3 v3.5.0-rc.0
hack/pin-dependency.sh go.etcd.io/etcd/client/v3 v3.5.0-rc.0
hack/pin-dependency.sh go.etcd.io/etcd/client/pkg/v3 v3.5.0-rc.0
hack/pin-dependency.sh go.etcd.io/etcd/pkg/v3 v3.5.0-rc.0
hack/pin-dependency.sh go.etcd.io/etcd/server/v3 v3.5.0-rc.0
hack/pin-dependency.sh go.etcd.io/etcd/tests/v3 v3.5.0-rc.0
hack/pin-dependency.sh google.golang.org/grpc latest
" | bash

2. Linted transitive dependencies until versions are clean:

hack/lint-dependencies.sh  | grep "  hack/pin-dependency.sh" | bash

3. Linted dependencies until dropped versions are clean:

hack/lint-dependencies.sh  | grep "dropreplace" | bash

4. Updated vendor and internal modules:

hack/update-vendor.sh
hack/update-internal-modules.sh

Repeated steps 2-4 until clean

vendor/github.com/soheilhy/cmux/.travis.yml

@@ -14,7 +14,7 @@ gobuild_args: -race
 
 before_install:
   - if [[ $TRAVIS_GO_VERSION == 1.6* ]]; then go get -u github.com/kisielk/errcheck; fi
-  - if [[ $TRAVIS_GO_VERSION == 1.6* ]]; then go get -u github.com/golang/lint/golint; fi
+  - if [[ $TRAVIS_GO_VERSION == 1.6* ]]; then go get -u golang.org/x/lint/golint; fi
 
 before_script:
   - '! gofmt -s -l . | read'

vendor/github.com/soheilhy/cmux/README.md

@@ -25,7 +25,7 @@ trpcL := m.Match(cmux.Any()) // Any means anything that is not yet matched.
 
 // Create your protocol servers.
 grpcS := grpc.NewServer()
-grpchello.RegisterGreeterServer(grpcs, &server{})
+grpchello.RegisterGreeterServer(grpcS, &server{})
 
 httpS := &http.Server{
 	Handler: &helloHTTP1Handler{},

vendor/github.com/soheilhy/cmux/cmux.go

@@ -15,6 +15,7 @@
 package cmux
 
 import (
+	"errors"
 	"fmt"
 	"io"
 	"net"
@@ -61,6 +62,9 @@ func (e errListenerClosed) Timeout() bool   { return false }
 // listener is closed.
 var ErrListenerClosed = errListenerClosed("mux: listener closed")
 
+// ErrServerClosed is returned from muxListener.Accept when mux server is closed.
+var ErrServerClosed = errors.New("mux: server closed")
+
 // for readability of readTimeout
 var noTimeout time.Duration
 
@@ -93,6 +97,8 @@ type CMux interface {
 	// Serve starts multiplexing the listener. Serve blocks and perhaps
 	// should be invoked concurrently within a go routine.
 	Serve() error
+	// Closes cmux server and stops accepting any connections on listener
+	Close()
 	// HandleError registers an error handler that handles listener errors.
 	HandleError(ErrorHandler)
 	// sets a timeout for the read of matchers
@@ -108,9 +114,10 @@ type cMux struct {
 	root        net.Listener
 	bufLen      int
 	errh        ErrorHandler
-	donec       chan struct{}
 	sls         []matchersListener
 	readTimeout time.Duration
+	donec       chan struct{}
+	mu          sync.Mutex
 }
 
 func matchersToMatchWriters(matchers []Matcher) []MatchWriter {
@@ -133,6 +140,7 @@ func (m *cMux) MatchWithWriters(matchers ...MatchWriter) net.Listener {
 	ml := muxListener{
 		Listener: m.root,
 		connc:    make(chan net.Conn, m.bufLen),
+		donec:    make(chan struct{}),
 	}
 	m.sls = append(m.sls, matchersListener{ss: matchers, l: ml})
 	return ml
@@ -146,7 +154,7 @@ func (m *cMux) Serve() error {
 	var wg sync.WaitGroup
 
 	defer func() {
-		close(m.donec)
+		m.closeDoneChans()
 		wg.Wait()
 
 		for _, sl := range m.sls {
@@ -204,6 +212,30 @@ func (m *cMux) serve(c net.Conn, donec <-chan struct{}, wg *sync.WaitGroup) {
 	}
 }
 
+func (m *cMux) Close() {
+	m.closeDoneChans()
+}
+
+func (m *cMux) closeDoneChans() {
+	m.mu.Lock()
+	defer m.mu.Unlock()
+
+	select {
+	case <-m.donec:
+		// Already closed. Don't close again
+	default:
+		close(m.donec)
+	}
+	for _, sl := range m.sls {
+		select {
+		case <-sl.l.donec:
+			// Already closed. Don't close again
+		default:
+			close(sl.l.donec)
+		}
+	}
+}
+
 func (m *cMux) HandleError(h ErrorHandler) {
 	m.errh = h
 }
@@ -223,14 +255,19 @@ func (m *cMux) handleErr(err error) bool {
 type muxListener struct {
 	net.Listener
 	connc chan net.Conn
+	donec chan struct{}
 }
 
 func (l muxListener) Accept() (net.Conn, error) {
-	c, ok := <-l.connc
-	if !ok {
-		return nil, ErrListenerClosed
+	select {
+	case c, ok := <-l.connc:
+		if !ok {
+			return nil, ErrListenerClosed
+		}
+		return c, nil
+	case <-l.donec:
+		return nil, ErrServerClosed
 	}
-	return c, nil
 }
 
 // MuxConn wraps a net.Conn and provides transparent sniffing of connection data.

vendor/github.com/soheilhy/cmux/go.mod

@@ -0,0 +1,5 @@
+module github.com/soheilhy/cmux
+
+go 1.11
+
+require golang.org/x/net v0.0.0-20201202161906-c7110b5ffcbb

vendor/github.com/soheilhy/cmux/go.sum

@@ -0,0 +1,12 @@
+golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
+golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
+golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
+golang.org/x/net v0.0.0-20201202161906-c7110b5ffcbb h1:eBmm0M9fYhWpKZLjQUUKka/LtIxf46G4fxeEz5KJr9U=
+golang.org/x/net v0.0.0-20201202161906-c7110b5ffcbb/go.mod h1:sp8m0HH+o8qH0wwXwYZr8TS3Oi6o0r6Gce1SSxlDquU=
+golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20200930185726-fdedc70b468f/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
+golang.org/x/text v0.3.3 h1:cokOdA+Jmi5PJGXLlLllQSgYigAEfHXJAERHVMaCc2k=
+golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
+golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=