Re: es 0.7

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

>     2.  It still looks like the dup redirection needs to call cpfd() instead
>         of mvfd().

oops.  i must have ``fixed'' this twice, the second one changing it back to the
old (wrong) way.  line 93 of prim-io.c should be a cpfd not a mvfd.

>    1.  Don't know what exactly 0.7 is doing with this protecting file
>        descriptors business, but I suspect there's effectively no change.

that's not true, but there is a bug in that code.  line 428 of input.c which is
				i->fd = close(i->fd);
should (of course) be
				i->fd = dup(i->fd);
because the 0 that close() returns is not too useful.

next time i'll try to be more careful.