A non-OO package for dumb terminals similar to GNU's readline. The preferred OO Package is Term::ReadLine::Perl5.
Since Term::ReadLine::Perl5::readline currently has global state, when more than one interface is created, we fallback to this code.
readline($prompt, [$in, [$out]])
A version readline for a dumb terminal, that is one that doesn't have many terminal editing capabilities. $prompt is the prompt to display; optional arguments $in and $out specify input and output file handles. STDIN and STDOUT are used when the corresponding file handles are not given.