reduce, foldl, foldr

[John J Foerch]

Hello,

I was surprised to find that `reduce' is part of cl.el but not core
elisp.  I read about Richard Stallman's reservations about introducing
utility functions with keyword arguments because they complicate the
interface.  I agree with this and wonder what the emacs maintainers
would think of putting `foldl' and `foldr' functions in core elisp
instead.

Thank you,
John Foerch