Newer ReadLine

Newer ReadLine

Finally I could compile GNU ReadLine2.1, so I got some experience with
T::R::Gnu. Unfortunately, debugger could not use any advanced features
of T::R::Gnu since it was accessing the features of T::R::Perl via
backdoors.

I reworked the interface to use object-oriented methods so that it
should not know anything about the particular ReadLine package it uses
(as far as it conforms to some simple interface).

Below is that part of the patch which should go into standard
distribution

Consider it as mildly emergent bug fix, it is -w-safe,

Enjoy,

p5p-msgid: 199703040634.BAA19919@monk.mps.ohio-state.edu