changes to rc

[Chris Siebenmann <cks>]

 I have a suggestion for people proposing changes to rc: the best way to
persuade people that it's a good idea is to implement it in your version
and then post the code so other people can try it out. We can argue for
ages about the merits of various features, but we're doing it in a vaccum.

 For example, I'd imagine that a builtin read would be much more likely
to be accepted if someone produced a good implementation of it (say,
one that respected IFS and so on), and posted said implementation. I know
I'd stick it into my version.

	- cks