node: ensure that streams2 won't `.end()` stdin
node: ensure that streams2 won't `.end()` stdin

Stdin is purely read-only stream. Although, `net.Socket` might be used
to create it if stdin is in fact a Pipe or TCP socket, the
`stream.Duplex` should not try to call `.end()` on it.

Fix: https://github.com/iojs/io.js/issues/1068
PR-URL: https://github.com/iojs/io.js/pull/1233
Reviewed-By: Chris Dickinson <38a75c4c4f5646d63b752460df745c5b937b7e58@gmail.com>

dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node