Readline and -DMINIMAL

[Eli Zaretskii]

> The readline directory in CVS is version
> 4.0 with changes from Eli Zaretskii (I hope he also notified the readline
> maintainer about these) to get things working on DJGPP.

I checked my patches against the recent beta version of Readline, and
all the changes are already taken care of there (the person who ported
Bash to DJGPP submitted almost identical patches to the Readline
maintainer).