update vendor

vendor/github.com/docker/go-connections/sockets/sockets_unix.go

@@ -0,0 +1,15 @@
+// +build !windows
+
+package sockets
+
+import (
+	"net"
+	"syscall"
+	"time"
+)
+
+// DialPipe connects to a Windows named pipe.
+// This is not supported on other OSes.
+func DialPipe(_ string, _ time.Duration) (net.Conn, error) {
+	return nil, syscall.EAFNOSUPPORT
+}