Implement CloseRead/CloseWrite

This:

* Changes `Close` to behave like the unix `close` (sends an EOF, ignores future
inbound data).
* Adds a `CloseWrite` to replace the current `Close`.
* Adds a `CloseRead` to close the read side, while leaving the write side open.

See libp2p/go-libp2p-core#166.

p2p/transport/quic/conn_test.go

@@ -20,7 +20,7 @@ import (
 
 	quicproxy "github.com/lucas-clemente/quic-go/integrationtests/tools/proxy"
 	ma "github.com/multiformats/go-multiaddr"
-	manet "github.com/multiformats/go-multiaddr-net"
+	manet "github.com/multiformats/go-multiaddr/net"
 
 	. "github.com/onsi/ginkgo"
 	. "github.com/onsi/gomega"
@@ -303,7 +303,7 @@ var _ = Describe("Connection", func() {
 				defer GinkgoRecover()
 				str, err := conn.AcceptStream()
 				Expect(err).ToNot(HaveOccurred())
-				str.Close()
+				str.CloseWrite()
 				d, err := ioutil.ReadAll(str)
 				Expect(err).ToNot(HaveOccurred())
 				Expect(d).To(Equal(data))

p2p/transport/quic/quic_multiaddr.go

@@ -4,7 +4,7 @@ import (
 	"net"
 
 	ma "github.com/multiformats/go-multiaddr"
-	manet "github.com/multiformats/go-multiaddr-net"
+	manet "github.com/multiformats/go-multiaddr/net"
 )
 
 var quicMA ma.Multiaddr

p2p/transport/quic/stream.go

@@ -38,4 +38,18 @@ func (s *stream) Reset() error {
 	return nil
 }
 
+func (s *stream) Close() error {
+	s.Stream.CancelRead(reset)
+	return s.Stream.Close()
+}
+
+func (s *stream) CloseRead() error {
+	s.Stream.CancelRead(reset)
+	return nil
+}
+
+func (s *stream) CloseWrite() error {
+	return s.Stream.Close()
+}
+
 var _ mux.MuxedStream = &stream{}

p2p/transport/quic/transport.go

@@ -22,7 +22,7 @@ import (
 	quic "github.com/lucas-clemente/quic-go"
 	ma "github.com/multiformats/go-multiaddr"
 	mafmt "github.com/multiformats/go-multiaddr-fmt"
-	manet "github.com/multiformats/go-multiaddr-net"
+	manet "github.com/multiformats/go-multiaddr/net"
 )
 
 var log = logging.Logger("quic-transport")