src/go.mod, net/http: update bundled and latest golang.org/x/net

Updates x/net/http2 to git rev 5d4f7005572804eaf7f5ecdd2473a62557f733ba

    http2: send WINDOW_UPDATE on a body's write failure
    https://golang.org/cl/245158 (fixes #40423)

also updates the vendored version of golang.org/x/net as per

$ go get golang.org/x/net@5d4f700557
$ go mod tidy
$ go mod vendor
$ go generate -run bundle std

For #40423.

Change-Id: I3270d0fb6f28889266596f7365d36d30ef2bb368
Reviewed-on: https://go-review.googlesource.com/c/go/+/258359
Run-TryBot: Emmanuel Odeke <emm.odeke@gmail.com>
TryBot-Result: Go Bot <gobot@golang.org>
Trust: Emmanuel Odeke <emm.odeke@gmail.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
diff --git a/src/go.mod b/src/go.mod
index 86e3c8c..3bdfbef 100644
--- a/src/go.mod
+++ b/src/go.mod
@@ -4,7 +4,7 @@
 
 require (
 	golang.org/x/crypto v0.0.0-20200820211705-5c72a883971a
-	golang.org/x/net v0.0.0-20200925080053-05aa5d4ee321
+	golang.org/x/net v0.0.0-20200927032502-5d4f70055728
 	golang.org/x/sys v0.0.0-20200923182605-d9f96fdee20d // indirect
 	golang.org/x/text v0.3.4-0.20200826142016-a8b467125457 // indirect
 )
diff --git a/src/go.sum b/src/go.sum
index 86a8c4b..6a03887 100644
--- a/src/go.sum
+++ b/src/go.sum
@@ -3,8 +3,8 @@
 golang.org/x/crypto v0.0.0-20200820211705-5c72a883971a h1:vclmkQCjlDX5OydZ9wv8rBCcS0QyQY66Mpf/7BZbInM=
 golang.org/x/crypto v0.0.0-20200820211705-5c72a883971a/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
 golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
-golang.org/x/net v0.0.0-20200925080053-05aa5d4ee321 h1:lleNcKRbcaC8MqgLwghIkzZ2JBQAb7QQ9MiwRt1BisA=
-golang.org/x/net v0.0.0-20200925080053-05aa5d4ee321/go.mod h1:/O7V0waA8r7cgGh81Ro3o1hOxt32SMVPicZroKQ2sZA=
+golang.org/x/net v0.0.0-20200927032502-5d4f70055728 h1:5wtQIAulKU5AbLQOkjxl32UufnIOqgBX72pS0AV14H0=
+golang.org/x/net v0.0.0-20200927032502-5d4f70055728/go.mod h1:/O7V0waA8r7cgGh81Ro3o1hOxt32SMVPicZroKQ2sZA=
 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 v0.0.0-20200323222414-85ca7c5b95cd/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
diff --git a/src/net/http/h2_bundle.go b/src/net/http/h2_bundle.go
index 458e0b7..5b92eb2 100644
--- a/src/net/http/h2_bundle.go
+++ b/src/net/http/h2_bundle.go
@@ -5265,6 +5265,7 @@
 		if len(data) > 0 {
 			wrote, err := st.body.Write(data)
 			if err != nil {
+				sc.sendWindowUpdate(nil, int(f.Length)-wrote)
 				return http2streamError(id, http2ErrCodeStreamClosed)
 			}
 			if wrote != len(data) {
diff --git a/src/vendor/modules.txt b/src/vendor/modules.txt
index d53b647..36d76e7 100644
--- a/src/vendor/modules.txt
+++ b/src/vendor/modules.txt
@@ -8,7 +8,7 @@
 golang.org/x/crypto/hkdf
 golang.org/x/crypto/internal/subtle
 golang.org/x/crypto/poly1305
-# golang.org/x/net v0.0.0-20200925080053-05aa5d4ee321
+# golang.org/x/net v0.0.0-20200927032502-5d4f70055728
 ## explicit
 golang.org/x/net/dns/dnsmessage
 golang.org/x/net/http/httpguts