patch to send incoming key to AuthorizedKeysCommand via stdin

[Peter Stuge]

Eitan Adler wrote:
> >> those limits suggest that the size is 128kiB on anything resembling a
> >> modern Linux system.
> >
> > How about other platforms?
> 
> Especially embedded systems which may have a lot less RAM?

What's the problem with forking and writing to the pipe from the
parent only when it is writable?


//Peter