stdio pipes should not be read-only

[piscisaureus]

Instead, make them duplex or make this configurable

[bnoordhuis]

You mean use socketpair() instead of pipe() to create the file descriptors? Or is this a Windows-only issue?

[piscisaureus]

@bnoordhuis The problem is that node sets the .readable property to false.

[chrisdickinson]

Closing this in favor of more recent issues + pull requests with more context.

#7941
#8349
#8417