Fix BZ#1420147: resolve connection reset by peer regression

Signed-off-by: Antonio Murdaca <runcom@redhat.com>

Author: Jim Minter

daemon/attach.go

@@ -36,7 +36,7 @@ func (daemon *Daemon) ContainerAttach(prefixOrName string, c *backend.ContainerA
 	}
 
 	cfg := stream.AttachConfig{
-		UseStdin:   c.UseStdin && container.Config.OpenStdin,
+		UseStdin:   c.UseStdin,
 		UseStdout:  c.UseStdout,
 		UseStderr:  c.UseStderr,
 		TTY:        container.Config.Tty,
@@ -79,7 +79,7 @@ func (daemon *Daemon) ContainerAttachRaw(prefixOrName string, stdin io.ReadClose
 		return err
 	}
 	cfg := stream.AttachConfig{
-		UseStdin:   stdin != nil && container.Config.OpenStdin,
+		UseStdin:   stdin != nil,
 		UseStdout:  stdout != nil,
 		UseStderr:  stderr != nil,
 		TTY:        container.Config.Tty,
@@ -147,6 +147,10 @@ func (daemon *Daemon) containerAttach(c *container.Container, cfg *stream.Attach
 		cfg.Stdin = r
 	}
 
+	if !c.Config.OpenStdin {
+		cfg.Stdin = nil
+	}
+
 	waitChan := make(chan struct{})
 	if c.Config.StdinOnce && !c.Config.Tty {
 		defer func() {