Re: redirection & fork

[Paul Haahr <haahr@mv.us.adobe.com>]

> This causes a fork:
>	echo ouch >[1=2]

well, i know how to make it work, but it involves substantial changes to the
redirection code, but that may be appropriate at this point.  (i've actually
been looking at redirection today, so that's not much of an issue for me at
the moment.)  will not be in 0.7, but if we do this, it will be in 0.75.

[note to the reader:  the same set of hacks are truly desirable for the librarified
(tcl-like) version of es we're planning for v2, so it probably will make it in
there anyway.]

re echo -u:  well, maybe, but only if we decided not to do it ``right''.  the
whole point of redirection is that programs don't take fds or file names as
arguments when they don't have to.