readline 4.2 update

[Andrew Cagney]

> Its been _over_ am month now since your responce.  And 2 months since my
> request to do this, and over a year since you said you would import 4.2
> when you got "a spare moment".  Please either do it, or give me
> permission to do it.  FreeBSD needs this, SuSE needs this as we both link
> gdb with a system libreadline.

Just FYI,

GDB 5.3 branches in ~< two weeks, so I don't know that doing an import 
now is a good idea :-/

Hmm, given that a GDB distro already needs to be bundled in with its own 
private version of BFD and OPCODES, I can't see why READLINE should be 
treated differently.

enjoy,
Andrew