accept not available in bash 2.2.21(1)

[jasonnet]

I'm just noting that the provided script does not work on Ubuntu 24.04.1 (under WSL or DigitalOcean). (I've not tried anything else.) Isolating the problem one sees:

$ enable -f accept accept
-bash: enable: cannot open shared object accept: accept: cannot open shared object file: No such file or directory

This version of bash appears to be 2.2.21(1):

$  bash --version
GNU bash, version 5.2.21(1)-release (x86_64-pc-linux-gnu)
Copyright (C) 2022 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>

This is free software; you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.    

If there's an easy fix for this, it would be great to document it for a newbie to a lot of this tech. (Ex. I didn't understand the suggestion of what to do if using bash < 5.2 .)