vendor libnetwork to 2e24aed516bd5c836e11378bb457dd612aa868ed

Signed-off-by: Tibor Vass <tibor@docker.com>

hack/dockerfile/install/proxy.installer

@@ -3,7 +3,7 @@
 # LIBNETWORK_COMMIT is used to build the docker-userland-proxy binary. When
 # updating the binary version, consider updating github.com/docker/libnetwork
 # in vendor.conf accordingly
-: "${LIBNETWORK_COMMIT:=ef149a924dfde2e506ea3cb3f617d7d0fa96b8ee}"
+: "${LIBNETWORK_COMMIT:=2e24aed516bd5c836e11378bb457dd612aa868ed}"
 
 install_proxy() {
 	case "$1" in

vendor.conf

@@ -40,7 +40,7 @@ github.com/gofrs/flock                              392e7fae8f1b0bdbd67dad7237d2
 # libnetwork
 
 # When updating, also update LIBNETWORK_COMMIT in hack/dockerfile/install/proxy.installer accordingly
-github.com/docker/libnetwork                        1a17fb36132631a95fe6bb055b91e24a516ad81d
+github.com/docker/libnetwork                        2e24aed516bd5c836e11378bb457dd612aa868ed
 github.com/docker/go-events                         e31b211e4f1cd09aa76fe4ac244571fab96ae47f
 github.com/armon/go-radix                           e39d623f12e8e41c7b5529e9a9dd67a1e2261f80
 github.com/armon/go-metrics                         eb0af217e5e9747e41dd5303755356b62d28e3ec

vendor/github.com/docker/libnetwork/resolver.go

@@ -484,7 +484,7 @@ func (r *resolver) ServeDNS(w dns.ResponseWriter, query *dns.Msg) {
 			resp, err = co.ReadMsg()
 			// Truncated DNS replies should be sent to the client so that the
 			// client can retry over TCP
-			if err != nil && (resp != nil && !resp.Truncated) {
+			if err != nil && (resp == nil || !resp.Truncated) {
 				r.forwardQueryEnd()
 				logrus.Debugf("[resolver] read from DNS server failed, %s", err)
 				continue

vendor/github.com/docker/libnetwork/vendor.conf

@@ -58,4 +58,4 @@ go.opencensus.io                        9c377598961b706d1542bd2d84d538b5094d596e
 gotest.tools                            1083505acf35a0bd8a696b26837e1fb3187a7a83 # v2.3.0
 github.com/google/go-cmp                3af367b6b30c263d47e8895973edcca9a49cf029 # v0.2.0
 
-github.com/moby/ipvs                    8f137da6850a975020f4f739c589d293dd3a9d7b # v1.0.0
+github.com/moby/ipvs                    4566ccea0e08d68e9614c3e7a64a23b850c4bb35 # v1.0.1